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: #Greenleaf Executive Producers Oprah Winfrey & Craig Wright with #Greenleaf star Merle Dandridge - GregAlan plays Ms. Winfrey"s brother Mac McCready in this exciting new series.  Responser: I'm so excited!! Although I was just a singer on the show I'm still excited to watch!!
