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: Plastic toys are floating in water. Sentence 2: The ladies are performing a dance.

Ex Output:
0


Ex Input:
Sentence 1: A white dog with red ears is running in the snow. Sentence 2: a wet black dog with a red collar is in the river

Ex Output:
1


Ex Input:
Sentence 1: Barack Obama admits US has 'more nuclear weapons than we need' Sentence 2: French gunman wants to 'die with weapons in hands'

Ex Output:

0