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: Hey guys. Very sad to let you know that I am pulling out of Wimbledon due to an injury. Very disappointed but grateful for a few great weeks in England. Thanks to all of u for the support. I will be back!!  Responser: Hope u get better!!!
