Demos - Datasets - Organization of Events - Publications


Demos

Interactive Dashboards for Social Media Analysis

The HAMiSon Dashboard is a visual interactive analysis tool built on the OpenSearch suite, designed to help researchers and analysts explore social media datasets, such as the collection of tweets surrounding the COP27 event we used for this demo. Released as a publicly available demo, the tool offers customizable visualizations, including standard charts and network displays. The platform enables users of varying expertise levels to filter and drill down into data enriched with annotations regarding user groups, sentiment, emotion, hashtags, communicative objectives, and stance. To demonstrate its capabilities, the demo includes four specific proof-of-concept dashboards built on the COP27 dataset: Emotion and Sentiment, Hashtags, Objectives and Stances, and Retweets Network. Although it is a demo, it is fully functional, allowing users to interact with the data, modify time frames, and share specific views via URL without requiring privileged permissions.


Information Diffusion Simulator

This tool is a demo of an Agent-Based Modeling (ABM) environment designed to simulate and analyze how information propagates through complex social networks. By integrating epidemiological logic with textual- and user-based factors, the tool allows us to test how the textual characteristics of a message, combined with network topology, affect the speed and reach of information spread. Users can configure behavioral probabilities to observe real-time transitions between agent states: from Neutral observers to endorsers (Infected), or deniers (Vaccinated). With real-time visualization of social links and synchronized data charts, the platform provides a sandbox for predicting diffusion outcomes and maximizing or mitigating the impact of shared information.


HAMiSoN retriever of checked-facts

This chatbot answer questions based on information found on the fact-checking sites Snopes, Maldita and GoogleFacts (for GoogleFacts, the retrieved information concerns articles containing the keyword “France” from the last 3 months). It can provide a short explanation about the subject and, if a claim is provided in the question, it should verify whether this claim is accurate or not, according to the information found on the three websites, and provide links to the source pages where the information was retrieved. The chatbot stays neutral and will not answer questions outside the boundaries of the information available on those three sites. Since this is a prototype, retrieved information used as a knowledge base is limited. The chatbot understands French, English and Spanish, although it answers in French. You will find it in the right corner of this page. Examples of questions:

  • Will we be able to check our collegues salary in france, soon ?
  • Is it true that Due to spending on aid to Ukraine, the French budget lacks funds to repair the Château de Chambord?
  • Es verdad lo que dice donald trump sobre el paracetamol y su relacion al autismo?

1 Dic 2025


Datasets

HAMiSoN Datasets

HAMiSoN datasets are published in Zenodo: zenodo.org/communities/hamison-project


Leaderboards

DIPROMATS 2024 Task 2 Leaderboard

Research teams can submit their results here, get automatically evaluated and, optionally, submit their results to the public leaderboard: huggingface.co/spaces/NLP-UNED/dipromats2024-task2-leaderboard.


Organization of events

HAMISON - Claim Detection Challenge

The Claim Detection Challenge is a sentence-classification competition over YouTube video shorts transcripts in several languages: English, Spanish and German (ViClaim corpus). Labels for each sentence are: fact‑check‑worthy claim (FCW), factual non‑check‑worthy claim (FNC), opinion (OPN) or none (NONE).

21 Apr 2025

DIPROMATS 2024 Automatic Detection and Characterization of Propaganda Techniques and Narratives from Diplomats of Major Powers

Shared task at IberLEF 2024 for the evaluation of systems able to detect and characterize propagandistic techniques and strategic narratives in tweets written by diplomats and authorities from USA, Europe, Russia and China in English and Spanish.

1 Mar 2024

ECAI 2024 Workshop on COuntering Disinformation with AI (CODAI 2024)

The International Workshop “CODAI: COuntering Disinformation with Artificial Intelligence” provides a platform for researchers from various domains to come together and not only present their works but also provide an ecosystem to discuss ideas which can facilitate countering the spread of misinformation.

19-20 Oct 2024

SEPLN 2023 Workshop on NLP applied to Misinformation

The objective of this workshop is to foster research both at the theoretical as well as at the level of practical real-world applications of NLP technologies applied to misinformation mitigation. The workshop aims at bringing together researchers, developers and industries interested in the problem of mitigating misinformation through NLP technologies. We will discuss recent trends and research projects, as well as developments and advances being made in the area of NLP to address the problem of misinformation from different perspectives.

26 Sep 2023


Publications

2025

  1. Patrick Giedemann, Pius von Däniken, Jan Deriu, Álvaro Rodrigo, Anselmo Peñas, Mark Cieliebak, 2025. ViClaim: A Multilingual Multilabel Dataset for Automatic Claim Detection in Videos. Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing (EMNLP 2025) pp. 397–413, Association for Computational Linguistics
  2. Jesús M Fraile-Hernández, Anselmo Peñas, Patrick Giedemann. Zero-shot narrative detection in social messaging. Knowledge-Based Systems. In Press. Elsevier. ISSN 0950-7051
  3. Jesús M. Fraile-Hernández and Anselmo Peñas, 2025. On measuring Large Language Models performance with inferential statistics. Information, Vol 16(9), 817, ISSN 2078-2489
  4. Raquel Rodríguez-García, Roberto Centeno, Álvaro Rodrigo, 2025. Simulating Misinformation Diffusion on Social Media Through CoNVaI: A Textual- and Agent-Based Diffusion Model. Proceedings of the Thirty-Fourth International Joint Conference on Artificial Intelligence Main Track. (IJCAI 2025) Pages 248-256.
  5. Jesus M. Fraile-Hernández and Anselmo Peñas. 2025. UNEDTeam at SemEval-2025 Task 10: Zero-Shot Narrative Classification. In Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025), pages 165–173, Vienna, Austria. Association for Computational Linguistics.

2024

  1. Pius von Däniken, Jan Deriu, Alvaro Rodrigo, and Mark Cieliebak, 2024. Improving Quantification with Minimal In-Domain Annotations: Beyond Classify and Count. Proceedings of the International AAAI Conference on Web and Social Media, 18(1), pp. 1585-1598
  2. Rajesh Sharma, Anselmo Peñas, Ahmed Sabir (Eds.) Proceedings of the First Workshop on COuntering Disinformation with Artificial Intelligence (CODAI 2024) co-located with European Conference on Artificial Intelligence 2024 (ECAI 2024), CEUR Workshop Proc. Vol. 3782, ISSN 1613-0073, Santiago de Compostela, Spain, 20 October 2024
  3. Jesús M. Fraile-Hernández, Álvaro Rodrigo, Roberto Centeno, 2024. Detecting fake news using Twitter social information. Proceedings of the First Workshop on COuntering Disinformation with Artificial Intelligence (CODAI 2024) CEUR Workshop Proc. Vol. 3782 pp. 19-28, ISSN 1613-0073
  4. Raquel Rodríguez-García, Álvaro Rodrigo, Roberto Centeno, 2024. Are Misinformation Propagation Models Holistic Enough? Identifying Gaps and Needs. Proceedings of the First Workshop on COuntering Disinformation with Artificial Intelligence (CODAI 2024) CEUR Workshop Proc. Vol. 3782 pp. 62-73, ISSN 1613-0073
  5. Jesus M. Fraile-Hernandez and Anselmo Peñas. 2024. HAMiSoN-Generative at ClimateActivism 2024: Stance Detection using generative large language models. In Proceedings of the 7th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2024), pages 79–84, St. Julians, Malta. Association for Computational Linguistics.
  6. Raquel Rodriguez-Garcia and Roberto Centeno. 2024. HAMiSoN-MTL at ClimateActivism 2024: Detection of Hate Speech, Targets, and Stance using Multi-task Learning. In Proceedings of the 7th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2024), pages 89–95, St. Julians, Malta. Association for Computational Linguistics.
  7. Raquel Rodriguez-Garcia, Julio Reyes Montesinos, Jesus M. Fraile-Hernandez, and Anselmo Peñas. 2024. HAMiSoN-Ensemble at ClimateActivism 2024: Ensemble of RoBERTa, Llama 2, and Multi-task for Stance Detection. In Proceedings of the 7th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2024), pages 118–124, St. Julians, Malta. Association for Computational Linguistics.
  8. Julio Reyes Montesinos and Alvaro Rodrigo. 2024. HAMiSoN-baselines at ClimateActivism 2024: A Study on the Use of External Data for Hate Speech and Stance Detection. In Proceedings of the 7th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2024), pages 156–160, St. Julians, Malta. Association for Computational Linguistics.
  9. Jesús M. Fraile-Hernández, Anselmo Peñas, Pablo Moral. Automatic Identification of Narratives: Evaluation framework, annotation methodology and dataset creation. IEEE Access. Print ISSN: 2169-3536, Online ISSN: 2169-3536 DOI: 10.1109/ACCESS.2024.3475579
  10. Pablo Moral, Jesús M. Fraile, Guillermo Marco, Anselmo Peñas and Julio Gonzalo. Overview of DIPROMATS 2024: Detection, Characterization and Tracking of Propaganda in Messages from Diplomats and Authorities of World Powers. Procesamiento del Lenguaje Natural, Vol. 73, 2024, pp. 347-358, ISSN 1135-5948
  11. Alberto Caballero, Roberto Centeno, Álvaro Rodrigo. 2024. LLM-Based Multi-Agent Models for Multiclass Classification of Strategic Narratives. Proceedings of the Iberian Languages Evaluation Forum (IberLEF 2024).
  12. Jorge Avila, Álvaro Rodrigo, Roberto Centeno. 2024. Best of Touché 2023 Task 4: Testing Data Augmentation and Label Propagation for Multilingual Multi-target Stance Detection. In: Goeuriot, L., et al. Experimental IR Meets Multilinguality, Multimodality, and Interaction. CLEF 2024. Lecture Notes in Computer Science, vol 14958. Springer. ISBN 978-3-031-71735-2
  13. Rodríguez-García, R., Centeno, R. and Rodrigo, Á. (2024), Together we can do it! A roadmap to effectively tackle propaganda-related tasks, Internet Research, Vol. ahead-of-print No. ahead-of-print, pp. 1-24, ISSN: 1066-2243
  14. Kumari Neha, Vibhu Agrawal, Saurav Chhatani, Rajesh Sharma, Arun Balaji Buduru, Ponnurangam Kumaraguru. Understanding Coordinated Communities Through The Lens Of Protest-centric Narratives: A Case Study on #CAA Protest. International AAAI Conference on Web and Social Media (ICWSM 2024), Vol. 18(1), pp. 1123-1133.
  15. Mudit Dhawan, Shakshi Sharma, Aditya Kadam, Rajesh Sharma, Ponnurangam Kumaraguru, Game-on: Graph attention network based multimodal fusion for fake news detection, Social Network Analysis and Mining, Vol. 14, 114 (2024).
  16. Shakshi Sharma, Anwitaman Datta, Rajesh Sharma. AMIR: An Automated Misinformation Rebuttal System—A COVID-19 Vaccination Datasets-Based Exposition. IEEE Transactions on Computational Social Systems, vol. 11, no. 6, pp. 7723-7733

2023

  1. Anselmo Peñas, Jan Milan Deriu, Rajesh Sharma, Guilhem Valentin, Julio Reyes-Montesinos, 2023. Holistic Analysis of Organised Misinformation Activity in Social Networks. In: Ceolin, D., Caselli, T., Tulin, M. (eds) Disinformation in Open Online Media. MISDOOM 2023. Lecture Notes in Computer Science, vol 14397. Springer, Cham.
  2. Anselmo Peñas, Jan Deriu, Rajesh Sharma, Guilhem Valentin, Julio Reyes-Montesinos, 2023. Hamison Project. Proceedings of the SEPLN 2023 Workshop on NLP applied to Misinformation (NLP-Misinfo-2023). Jaén, Spain, CEUR-WS Vol-3525, pp. 52-57, 2023. ISSN 1613-0073.
  3. J. M. Molero, J. Pérez-Martín, A. Rodrigo and A. Peñas, 2023. Offensive Language Detection in Spanish Social Media: Testing from Bag-of-Words to Transformers Models. In IEEE Access, vol. 11, pp. 95639-95652, 2023.
  4. Jorge Avila, Alvaro Rodrigo, Roberto Centeno. Silver Surfer team at Touché task 4: Testing Data Augmentation and Label Propagation for Multilingual Stance Detection. Working Notes of CLEF 2023 - Conference and Labs of the Evaluation Forum, CEUR Workshop Proceedings, Vol. 3497, 2023.
  5. Roberto Centeno, Rodrigo Agerri, 2023. Overview of NLP-MisInfo 2023: Workshop on NLP applied to Misinformation. Proceedings of the SEPLN 2023 Workshop on NLP applied to Misinformation (NLP-Misinfo-2023). Jaen, Spain, CEUR-WS Vol-3525, pp. 1-9, 2023. ISSN 1613-0073.
  6. Roberto Centeno and Rodrigo Agerri (editors), 2023. Proceedings of the SEPLN 2023 Workshop on NLP applied to Misinformation (NLP-Misinfo-2023). Jaen, Spain, CEUR-WS Vol-3525, 2023. ISSN 1613-0073.
  7. Pius von Däniken, Jan Deriu, Mark Cieliebak. ZHAW-CAI at CheckThat! 2023: Ensembling using Kernel Averaging. Working Notes of CLEF 2023 - Conference and Labs of the Evaluation Forum.
  8. Shakshi Sharma, Anwitaman Datta, Vigneshwaran Shankaran, Rajesh Sharma, 2023. Misinformation Concierge: A proof-of-concept with COVID-19 vaccination Twitter dataset. 32nd ACM International Conference on Information and Knowledge Management (CIKM), 2023
  9. Gustav Nikopensius, Mohit Mayank, Orchid Chetia Phukan, Rajesh Sharma, 2023. Reinforcement Learning-based Knowledge Graph Reasoning for Explainable Fact-checking. IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM), 2023