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: Did a little exploring in Prague on my day off today. Such a beautiful city! Loving Europe so far and headed to Paris tomorrow to get ready for ROLAND-GARROS.  Responser: Stay strong, i love you!
