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: The new Sioux Falls campaign office sign is up and we're open for business! Stop in to 715 S. Minnesota Ave. to help out or pick up a bumper sticker...  Responser: That location in S.F. is pretty much the standard operating location for virtually every type or level of political campaign.
