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: Janet C from Jonesboro Arkansas wrote me about her struggles with MS.  Responser: To see a lot of blogs on CCSVI and the results go to CCSVI Locator http://ccsvi-ms.ning.com/
