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 little white curly haired dog runs across the pavement with a stick in its mouth. Sentence 2: A white curly haired dog runs with a stick in it's mouth.

Ex Output:
5


Ex Input:
Sentence 1: Two green birds fly towards a wooden telephone pole. Sentence 2: Two green birds flying above the telephone wires.

Ex Output:
3


Ex Input:
Sentence 1: A small black dog is in the grass. Sentence 2: A black dog is running in the grass.

Ex Output:

4