The Semantic Web: ESWC 2021 Satellite Events - Ruben Verborgh, Anastasia Dimou, Aidan Hogan, Claudia d'Amato, Ilaria Tiddi, Arne Bröring, Simon Mayer, Femke Ongenae, Riccardo Tommasini, Mehwish Alam (Springer, 2021)