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: This morning, Todd Akin said: "First of all, from what I understand from doctors [pregnancy from rape] is really rare. If it's a legitimate rape, the female body has ways to try to shut that whole thing down."  Responser: I'm a doctor. He's an uninformed idiot.
