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: Wrapped up an awesome day of campaigning with Dr. Babur Lateef in Prince William County. Voters have great choices up and down the ballot in all parts of Virginia.  Responser: Looking forward to your leadership in the Senate, Tim!
