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: LIKE and SHARE this status if you think the administration needs to approve the Keystone XL pipeline to create jobs and bring down energy costs.  Responser: Yes we need jobs but I won't be tricked for a second to think that energy prices would go down.
