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: Always a lift to be back at Beverly Cleary (Fernwood) School. Super kids, great teachers and opportunities.  Responser: You're one of my favorite congressmen! Why did you have to go and use Comic Sans?
