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: Went see my favorite California Fuzz Rockers @fumanchuband at Alex's Bar in Long Beach last night. Little did I know till I walked in it was also Eric Northman's bar Fangtasia in @truebloodhbo "Hell on Wheels" indeed.  Responser: Hell Yeah used to live near there in Seal Beach. That bar is great!
