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.
Q: Poster: Green Party condemns destruction of world-renowned Department of Fisheries and Oceans libraries  Responser: This is truly sickening.
A: 
Neutral