From Theory to Practice: Demonstrators of FAIR Data Spaces Across Different Sectors. - Nikolaus Glombiewski; Zeyd Boukhers; Christian Beilschmidt; Johannes Drönner; Michael Mattig; Artur Piet; Robert Pietrzynski; Mehrshad Jaberansary; Macedo Maia; Sebastian Beyvers; Yeliz Üçer Yediel; Muhammad Hamza Akhtar; et al. (SAC, 2025)