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: Man in his boxers carving a pumpkin. Sentence 2: A man is using a knife.
C

Sentence 1: Man in red jacket giving a thumbs-up with one hand a holding ticket in other. Sentence 2: Man is waiting to get in the concert
N

Sentence 1: A young black man is having a conversation with a young black woman from his balcony. Sentence 2: The man and woman are brother and sister.

N