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 day in 1945: Iwo Jima gets Old Glory http://nyti.ms/24cc9mB  Responser: Cool Josh. Thanks for posting. My Dad was WWII vet in the South Pacific. He served almost 4 years, 3 as an intelligence scout.
