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: On this day in 1979, Margaret Thatcher became Prime Minister of the United Kingdom.  Responser: A GREAT LADY WHO STOPD BY HER CONVICTIONS. SAD OUR GOVERNMENT DID NOT ATTEND HER FUNERAL. SHE WAS TRULY A PATROTIC.
