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.

[EX Q]: Sentence 1: A runner winces as he runs. Sentence 2: His leg fell off while he was running.
[EX A]: C

[EX Q]: Sentence 1: Man cleans roller coaster. Sentence 2: Cleaning roller coaster
[EX A]: C

[EX Q]: Sentence 1: Three people walk along a trail in a greenbelt in a forest. Sentence 2: Three people are on a nature walk.
[EX A]:
N