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 really, really enjoy doing live readings, they're like playing rock shows without all the heavy amps and clueless sound guys, and I want to do a lot more of them. Consider this an open invitation to send me invitations.  Responser: The Avid Reader, Davis, CA
