Instructions: 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: Team LoBiondo joins Frank & Tina in saying THANK YOU SOUTH JERSEY for your support, encouragement & votes.  Responser: Congratulations!!! Keep up your great work!!!
Output:
Positive