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: I need your help to get on the ballot this Nov. Please go to http://duffyforcongress.com/nomination-papers to help. Let's roll!  Responser: I am happy to say that Tim's first official political act as an 18 year old will be to sign your nomination papers on April 20th.
