https://tobitate.mext.go.jp/news/detail.html?id=326
https://www.slideshare.net/DeepLearningJP2016/dlhackstensorflowprivacy
https://www.slideshare.net/DeepLearningJP2016/dl-hacksdeep-learning-with-differential-privacy-martin-abadi-et-al-118956251
https://www.slideshare.net/DeepLearningJP2016/dlhacksfast-and-accurate-entity-recognition-with-iterated-dilated-convolutions-102636484