BioASQ - Large-scale biomedical semantic indexing and question answering (http://www.bioasq.org/workshop2023)

CheckThat! - Check-Worthiness, Subjectivity, Political Bias, Factuality, and Authority of News Articles and Their Sources (http://checkthat.gitlab.io)

DocILE - Document Information Localization and Extraction (https://docile.rossum.ai/)

eRisk - Early Risk Prediction on the Internet (https://erisk.irlab.org/)

EXIST - sEXism Identification in Social neTworks (http://nlp.uned.es/exist2023/)

iDPP@CLEF - Intelligent Disease Progression Prediction at CLEF (https://brainteaser.health/open-evaluation-challenges/idpp-2023/)

ImageCLEF - Multimedia Retrieval Challenge in CLEF (https://www.imageclef.org/2023)

JOKER - Automatic Wordplay Analysis (http://joker-project.com/)

LifeCLEF - Multimedia Retrieval in Nature (http://www.lifeclef.org/)

LongEval - Longitudinal Evaluation of Model Performance (https://clef-longeval.github.io/)

PAN - Lab on Digital Text Forensics and Stylometry (https://pan.webis.de)

SimpleText - Automatic Simplification of Scientific Texts (http://simpletext-project.com/)

Touché - Argument Retrieval (https://touche.webis.de)

• Participants agree to join the evaluation activities as being organised under this CLEF 2023 edition, from now on the Organizers.
• Participants agree to use the Corpora and Data made available by CLEF 2023 lab organizers only for the purpose of their participation in the CLEF 2023 activities. Participants agree not to reproduce these Corpora and Data for distribution in any forms or by any means, whether it be for commercial or free distribution.
• Organisers reserve the right at their sole discretion to revoke any Participant’s access to shared Corpora and Data at any time. Upon request, Participant must immediately (i) cease all use of released Corpora and Data, and (ii) delete and/or return (at Organisers' sole discretion) all or part of the Corpora and Data.
• Organisers allow Participants to display or publish small excerpts of the Corpora and Data and its properties in a scientific or technical context provided this publication is solely made for the purpose of describing the research. Any such use shall not infringe on the rights of any third parties.
• Participants agree with the Organisers' data protection policy, available at https://clef2023-labs-registration.dei.unipd.it/privacy/.