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: BREAKING NEWS: A man has been beheaded in a terrorist attack on a chemical factory in France. French authorities say a man's head was found impaled on the factory fence with a flag with Islamic writing was found nearby. One person has been taken into custody. Updates on NBC LA #TODAYInLA  Responser: Thank you Daniella! Crazy world out there!
