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: http://trentkelly.house.gov/constituent-services/washington-dc.htm  Responser: Reject > DARK ACT / S.764 ( codes, smartphone, bandwidth? ) Uphold > Vermont GMO Law - Respecting our right to know what's in the food we buy. > NO on DARK ACT/ S.764
