Overview of the CLEF-2025 CheckThat! Lab Task 1 on Subjectivity in News Articles. - Federico Ruggeri; Arianna Muti; Katerina Korre; Julia Maria Struß; Melanie Siegel; Michael Wiegand; Firoj Alam; Md. Rafiul Biswas; Wajdi Zaghouani; Maria Nawrocka; Bogdan Ivasiuk; Gogu Razvan; et al. (CLEF (Working Notes), 2025)