*CfP: Hybrid 21st International Semantic Web Conference (ISWC 2022)* Hangzhou, China, October 23-27, 2022 https://iswc2022.semanticweb.org/ The International Semantic Web Conference (ISWC) is the premier venue for presenting fundamental research, innovative technology, and applications concerning semantics, data, and the Web. It is the most important international venue to discuss and present the latest advances and applications of the semantic Web, knowledge graphs, linked data, ontologies and artificial intelligence (AI) on the Web. A great way to advance the state of the art in a given domain is to create competition. We invite you to propose an ISWC 2022 Challenge, in which you define an open competition on a problem of your choice within the Semantic Web domain. Call for Semantic Web Challenge Proposals: https://iswc2022.semanticweb.org/index.php/semantic-web-challenge-proposals/ Deadline: Thursday, 24th March, 2022, 23:59 AoE (Anywhere on Earth) Semantic Web Challenge Chairs: - Catia Pesquita, LASIGE, Faculdade de Ciências, University of Lisbon clpesquita@fc.ul.pt - Daniele Dell’Aglio, Aalborg University, Denmark dade@cs.aau.dk Follow us on social media: - Twitter: @iswc_conf #iswc_conf (https://twitter.com/iswc_conf) - LinkedIn: https://www.linkedin.com/groups/13612370 - Facebook: https://www.facebook.com/ISWConf - Instagram: https://www.instagram.com/iswc_conf/ The ISWC 2022 Organizing Team Organizing Committee – ISWC 2022 (semanticweb.org) <https://iswc2022.semanticweb.org/index.php/organizing-committee/>