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.

Example Input: Sentence 1: A white dog is trying to catch a ball in midair over a grassy field. Sentence 2: A man threw a red ball to his dog.
Example Output: N

Example Input: Sentence 1: A riot squad making their way through a crowd. Sentence 2: There is a riotous crowd outside.
Example Output: C

Example Input: Sentence 1: A black and silver formula one car driven by a racer with a red helmet is going down a racetrack. Sentence 2: A racer is driving a formula one car.
Example Output:
C