Recurrent Neural Network
https://www.cs.toronto.edu/~tingwuwang/rnn_tutorial.pdf1. RNN in sports 1. Sport is a sequence of event (sequence of images, voices) 2. Detecting events and key actors in multi-person videos [12] 1. "In particular, we track people in videos and use a recurrent neural network (RNN) to represent the track features. We learn time-varying attention weights to combine these features at each time-instant.