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: So excited to finally be able to share.... Mallory will be back!! And, this Sunday is a another new episode of Heartland: Sunday at 7pm. Check out the Blog Whispers' post for more details.  Responser: Will Jake come back with her ?
