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 wanted to pass along this opinion piece about a recent house party I attended in Hyde Park to meet some voters. Thanks for the great write-up! http://massmarrier.blogspot.com/2012/10/back-porch-capuano.html  Responser: Nice article. First time I've seen you referred to as "Cappy"
