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: Vice President Biden is right: the Ryan plan, which Joe Walsh voted for 3 times, jeopardizes Medicare and makes seniors pay more out-of-pocket.  Responser: I am walking for Tammy Duckworth on Saturday, Oct. 13th . Office 1310 W.Northwest Hwy. Arlington Hts. Il. It is a beautiful season to walk for what you believe in.
