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: The passage of this healthcare takeover lays in the hands of just a few Dems, we are keeping the heat on them and you should too. Speak up!  Responser: is beginning to wonder when the Dems will begin to resent being asked to 'take one for Obama' given that it may well mean 'falling on their sword' - figuratively speaking.
