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 rooster pecks at a dead mouse. Sentence 2: A chicken is pecking at a dead mouse.

Ex Output:
4


Ex Input:
Sentence 1: The military officer barked at the recruits. Sentence 2: An officer is talking to recruits.

Ex Output:
2


Ex Input:
Sentence 1: It is an excellent indicator of climate change. Sentence 2: I think we all agree on the nature of the change.

Ex Output:

2