644 YouTube-8M: A Large-Scale Video Classification Benchmark Sami Abu-El-Haija; Nisarg Kothari; Joonseok Lee; Apostol Natsev; George Toderici; Balakrishnan Varadarajan; Sudheendra Vijayanarasimhan ArXiv 2016 122 645 The Concrete Distribution: A Continuous Relaxation of Discrete Random Variables Chris...