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: Only 18 days until Dept. of Homeland Security shuts down. Republicans are wasting time! Read my Michigan Chronicle column: #DontShutDownOurSecurity!  Responser: You can gruber your constituents but Americans are wise to your straw man false narrative. http://www.washingtontimes.com/news/2015/feb/3/democrats-filibuster-dhs-spending-bill/
