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 spokesman for stockwell day was not immediately available for Sentence 2: chinese authorities were not immediately available for comment.
[EX A]: 1

[EX Q]: Sentence 1: Some believe the 'right' is most important. Sentence 2: Some believe not slaughtering the unborn is most important.
[EX A]: 1

[EX Q]: Sentence 1: Is Madeleine McCann Still Alive? Sentence 2: Reopen Madeleine case, police urge
[EX A]:
1