POLAR: A Benchmark for Multilingual, Multicultural, and Multi-Event Online Polarization. - Usman Naseem; Juan Ren; Saba Anwar; Sarah Kohail; Rudy Alexandro Garrido Veliz; Robert Geislinger; Aisha Jabr; Idris Abdulmumin; Laiba Qureshi; Aarushi Ajay Borkar; Maryam Ibrahim Mukhtar; Abinew Ali Ayele; et al. (CoRR, 2025)