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: Honored to have CA Treasurer & #CA15's own Bill Lockyer endorse my re-election. Will work w/ him to grow our economy & middle class.  Responser: The Contra Costa Central Committee was pleased last night when I announced Bill Lockyer's endorsement for your reelection!
