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: Boeing's board is also expected to decide at its December meeting whether to offer the airplane for sale to airlines. Sentence 2: It is widely expected to give Bair formal approval to offer the plane for sale to airlines.
[A]: 2


[Q]: Sentence 1: A woman is boiling shrimp. Sentence 2: A woman is combing her hair.
[A]: 1


[Q]: Sentence 1: Two men are fighting in a cow pasture. Sentence 2: Two men are fighting in a cattle pen.
[A]:
4