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: A black and brown dog walks through the snow near a building. Sentence 2: An older man stands outside a old boarded up building.
[A]: 1

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

[Q]: Sentence 1: St. Paul Chairman and Chief Executive Jay S. Fishman, 51, will be CEO of the combined company. Sentence 2: Jay Fishman, 51, chairman and chief executive of St Paul, will be chief executive of the combined company.
[A]:
5