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: Back-to-Back Polls Show Rand Paul With 15-Point Lead Over Jack Conway - http://bit.ly/9MelBB  Responser: @James V Oney, @Dan Anderson -- take a look at Gary Johnson, former governor of NM. Ron Paul has expressed support for him.
