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: US Open starts Monday. Let's get psyched!!  Responser: Good Luck girl,,,,last year you reached to 4th round go go this year to final round set your mind to it OK you can do it.
