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 man is standing beside a projection screen, and he is directing the attention of a certain area of the screen to other people sitting at tables to listen and watch. Sentence 2: People are gathered to watch a screen.
C

Sentence 1: A dog is running along a beach with a red object in its mouth. Sentence 2: the dog is having fun at the beach
N

Sentence 1: A bald man wearing a gray shirt and dark pants walking up a step next to a building in a city. Sentence 2: A bald man walking up stairs.

C