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: Press Release: Buchanan Unveils Oil Spill Prevention Act, Cracks Down On Oil Industry And Federal Regulators  Responser: ...worse (appolgies for the typo)

Negative