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: Several women and children are walking along a graffiti covered wall. Sentence 2: A group of women and children are in motion.
Example Output: C

Example Input: Sentence 1: Three people are standing on their heads in unison. Sentence 2: Two children sit on their hands on the floor.
Example Output:
C