神经网络学到了什么? o I was given a card by her in the garden O In the garden, she gave me a card O She gave me a card in the garden o She was given a card by me in the garden O In the garden, I gave her a card 15 o I gave her a card in the garden 20 15 (Sutskever et al., 2014)16神经网络学到了什么？ 16 (Sutskever et al., 2014)