This is just an ordinary use of supervised learning; they just used Mechanical Turk instead of undergrads. The point of the human classification was to generate

This is just an ordinary use of supervised learning; they just used Mechanical Turk instead of undergrads. The point of the human classification was to generate the labeled data for model training. The talk they gave, "Deep learning for NLP (without magic)" was pretty good: http://techtalks.tv/events/312/573/ http://techtalks.tv/events/312/573/