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: Obama administration refuses to release IRS documents ***Attempts to obtain information that could shed light on the targeting scandal have been met with numerous excuses  Responser: this is bullshit... we must have ACCOUNTABILITY!!! I say we ABOLISH THE IRS! Its not a law and we dont need it!
