Foundation Models to Tackle Activity Recognition in Unknown Domain: Sussex-Huawei Locomotion Challenge 2025 Task 2. - Tsuyoshi Okita 002; Kosuke Ukita; Asahi Miyazaki; Daichi Kubota; Jukichi Ota; Naoki Kagiyama; Asahi Nishikawa; Daichi Nagayasu; Syunya Tomitaka; Daisuke Nozaki; Yuki Odo; Raku Yamashita; et al. (UbiComp Companion, 2025)