[ACM Press the 40th International ACM SIGIR Conference - Shinjuku, Tokyo, Japan (2017.08.07-2017.08.11)] Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval - SIGIR '17 - Non-negative Matrix Factorization Meets Word EmbeddingAilem, Melissa; Salah, Aghiles; Nadif, Mohamed · 2017