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: Thrilled that the House has passed the standalone "Don't Ask Don't Tell" repeal bill that I introduced in the Senate last week. Now, it's the Senate's turn. We must stay in session as long as it takes to get this done.  Responser: Keep it up Senator Gillibrand We need to get this bill pass before Christmas Thank you Happy Holiday
