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: INNOCENCE is available TODAY in hardcover, ebook, and audio! Click below to watch a message from Dean.  Responser: Already got it on Kindle and will be reading it at lunchtime.
