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 Input:
Sentence 1: An airplane is flying in the air. Sentence 2: A South African Airways plane is flying in a blue sky.

Ex Output:
3


Ex Input:
Sentence 1: So YES, we DO read the bible to learn about Christianity. Sentence 2: personally i would read the bible to learn about christianity.

Ex Output:
3


Ex Input:
Sentence 1: Shares of Hartford rose $2.88 to $46.50 in New York Stock Exchange composite trading. Sentence 2: Shares of Hartford were up $2.28, or 5.2 percent, to $45.90 in midday trading.

Ex Output:

2