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.

[Q]: Sentence 1: A man in a black shirt and jeans stands at a microphone holding a guitar. Sentence 2: The man is performing.
[A]: C


[Q]: Sentence 1: The woman is smiling at the mirror while in a bathroom. Sentence 2: A woman is dancing with her child.
[A]: C


[Q]: Sentence 1: A blond dog runs down a flight of stairs to the backyard. Sentence 2: The dog is chasing a tennis ball.
[A]:
N