CheckThat!: Check-Worthiness, Subjectivity, Political Bias, Factuality, and Authority of News Articles and their Sources

From its conception, the CheckThat! lab has been dedicated to promoting and fostering the development of technology to assist investigative journalists to perform fact-checking, focusing on political debates, social media posts, and news articles. The five previous editions of CheckThat! focused on the main tasks of the information verification pipeline: check-worthiness, verifying whether a claim was fact-checked before, supporting evidence retrieval, and claim verification. In this sixth edition, the lab focuses into some new problems and for the first time five tasks are offered in seven languages: Arabic, Dutch, English, German, Italian, Spanish, and Turkish.