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 white cat standing on a carpet. Sentence 2: A sheep standing in a forest.
[EX A]: 0

[EX Q]: Sentence 1: amnesty international is a rights group based in london. Sentence 2: the international institute for strategic studies is located in london.
[EX A]: 1

[EX Q]: Sentence 1: Egypt's leader imposes state of emergency in 3 cities Sentence 2: Egypt president declares state of emergency in three cities
[EX A]:
5