In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to choose whether the two sentences clearly agree (entailment)/disagree (contradiction) with each other, or if this cannot be determined (neutral). Your answer must be in the form of the letters E, C, and N respectively.

Example Input: Sentence 1: A band consisting of three men and a woman perform in an alley with a van in the background. Sentence 2: A band is having an impromptu practice in front of their tour van before a concert.
Example Output: N

Example Input: Sentence 1: A street cleaner walks up the street with his broom and dustpan. Sentence 2: A man reads a book on the couch.
Example Output: C

Example Input: Sentence 1: a lone person jumping through the air from one snowy mountain to another. Sentence 2: A person jumps in the air.
Example Output:
C