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: The Chris/Martina documentary "30 For 30: Unmatched" is airing in EUROPE on ESPN Classic this Sunday, Feb 27 at 10 pm.  Responser: I am SO GLAD I watched this a while ago. I seriously LOVED Chris and HATED Martina......until I saw this.
