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: This week Michelle Howard became the first woman to attain the rank of four-star admiral in the Navy's history. Congratulations to Admiral Howard on leading the way for women in the Navy. http://www.navy.mil/submit/display.asp?story_id=81979  Responser: Wow, congratulations Admiral Howard on making American history
