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.

[EX Q]: Sentence 1: A man and woman are Bollywood dancing. Sentence 2: A man an woman are dancing in the rain.
[EX A]: 2

[EX Q]: Sentence 1: Thousands evacuated in Moscow metro fire Sentence 2: Thousands evacuated after fire breaks out in Moscow Metro
[EX A]: 5

[EX Q]: Sentence 1: A black and a yellow dog Sentence 2: A black dog and a brown-and-white dog play in a field.
[EX A]:
2