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: Season 6 Premiere of 'Heartland' is now Sept 16th!!!! at 7:00 on CBC. I hope you can watch . http://www.cbc.ca/heartland/2012/08/season-6-premiere-now-september-16-2012.html  Responser: Ratings are going to go up with all your fans watching!
