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: Spoke @ the Price Co Lincoln dinner this afternoon. Its great to see such an energized crowd! http://yfrog.com/obxgncoj  Responser: Keep up the great work Sean. If I was in your district, you'd have my vote :) Thankfully Tammy Baldwin is running for senate (& hopefully won't win), so I'm praying Chad Lee wins her seat for 2nd district.
