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.

Sentence 1: Two girls sit back to back. Sentence 2: two girls are sitting together.
C

Sentence 1: Two men in western attire with a brown horse kicking into the air. Sentence 2: Two men in western attire with a horse
N

Sentence 1: Surfer does trick in wave as seen from behind Sentence 2: He knows how to swim.

N