ContextGNN: Beyond Two-Tower Recommendation Systems - Yuan, Yiwen; Zhang, Zecheng; He, Xinwei; Nitta, Akihiro; Hu, Weihua; Shah, Manan; Stojanovic, Blaz; Huang, Shenyang(Andy); Lenssen, Jan E; Leskovec, Jure; Fey, Matthias (International Conference on Learning Representations, 2025)