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: Looking forward to the Irvington Parade today. Had a great time as the Grand Marshal in the Yorktown parade yesterday and Spotsy and Fredericksburg on Saturday for their festivities.  Responser: sorry I missed you in Fredericksburg on Saturday! I was there too!
