Definition: Given a 'poster' sentence and a corresponding 'response' (often, from Facebook or Reddit)classify the sentiment of the given response into four categories: 1) Positive, 2) Negative, 3) Neutral, and 4) Mixed if it contains both positive and negative.
Input: Poster: "We have a responsibility to stand watch over one another, we are watchers, all of us, watchers, guarding against the darkness."  Responser: "Watchers" is by far my favorite book! The creepiest - "Whispers", which is also the very first book I read of his and got me hooked!
