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: A young boy jumps into a pool with outstretched arms. Sentence 2: A dog jumps into a backyard pool.

Ex Output:
1


Ex Input:
Sentence 1: Liquid ammonia leak kills 15 in Shanghai Sentence 2: Liquid ammonia leak kills at least 15 in Shanghai

Ex Output:
5


Ex Input:
Sentence 1: South Korea Orders Immediate Shutdown of 2 Nuclear Reactors Sentence 2: South Korea to boost nuclear power?

Ex Output:

1