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: Today the Mexican Govt asked a US Federal court to over the Ariz. immigration law. Arizonia is a sovereign state and does not need the Mexican govt to tell it how to protect its citizens.  Responser: Obama Administration is hard at work for everyone but American citizens
