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: Want to make calls, but can't make it to the office? Check out our call from home tool! http://ow.ly/cNlIc  Responser: I'm volunteering tomorrow night! I believe in Lois' candidacy and want her in Congress!
