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: Here is a link to order Tony's book if you haven't had a chance to check it out! - Team Tony http://www.amazon.com/Like-Apologize-Every-Teacher-Ever/dp/0307887863/ref=sr_1_1?ie=UTF8&qid=1347507380&sr=8-1&keywords=i%27d+like+to+apologize+to+every+teacher+i+ever+had  Responser: I'd like Tony danza's book......said no one ever
