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: 1 year ago, the Senate passed immigration reform, and now the House should take action to reform our broken immigration system too. Over 600 businesses from across the country agree: doing so is crucial to a robust, thriving economy. Read more here: http://goo.gl/KI6uN5  Responser: Follow our laws. Secure the border!
