Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.

[Q]: Sentence 1: Fallen US firefighters brought home Sentence 2: Wall Street ends slightly lower
[A]: 0


[Q]: Sentence 1: The man is riding a bike down a dirt hill. Sentence 2: A trick bicyclist grinds down a handrail.
[A]: 2


[Q]: Sentence 1: A beauty contest to be held in Italy next week may be the first for pixel-perfect pin-ups. Sentence 2: A new beauty contest kicking off in Italy next week will give pixel-perfect pin-ups the chance to steal sultry Sophia's sex-symbol status.
[A]:
3