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: How Stranger Things (and the streaming era, in general) revived a TV staple: the opening credits: My Medium post: https://medium.com/@carlquintanilla/the-art-of-the-title-7d0a859b9bfc#.cavb648om  Responser: Next: Catchy theme songs with lyrics you are unable to forget
