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: Congratulations Boston Red Sox! World Series Champions!  Responser: Boston could have been Stronger, if they had done the right thing & elected you to the Senate.

Negative