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 cast the decisive 218th vote to pass the House health care reform bill, but let me tell you why I am concerned...  Responser: thank you sooo much for your no vote on the resolution to condemn the goldstone report. u.s. support for israeli brutality and apartheid has to stop.
