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: I finally made it to LA. Any Los Angelenes in my readership wanna hang out?  Responser: How gracious of you to offer! I know I'm not the only one who'd fancy the chance to shake your hand & chat with you whilst you're in L.A.
