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: Tammy's going to be on Piers Morgan Tonight between 8-9 pm CT!  Responser: @Eric Smith If you go to www.tammyduckworth.com and click on Issues, you can read Duckworth's stance on the issues.
