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: A crowd of people on a street corner, three boys with their shirts tucked up. Sentence 2: No one is around.
C

Sentence 1: A bicycle racer slides down the hill toward a flag while spectators watch along the tree lined route. Sentence 2: Someone is riding a yellow mountain bike.
N

Sentence 1: A boy and girl are standing together, and the girl is holding a volleyball. Sentence 2: A boy and girl are sitting in class.

C