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: Don't let President Obama replace Justice Scalia with a liberal who will take away Second Amendment rights!  Responser: If you need a Marine to assist you just let me know.

Mixed