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: Teenage girl killed in east London Shereka Marsh was shot in the neck, police say Sentence 2: Hackney shooting: Teenager Shereka Marsh 'bled to death after being shot in neck'

Ex Output:
5


Ex Input:
Sentence 1: The company didn't detail the costs of the replacement and repairs. Sentence 2: But company officials expect the costs of the replacement work to run into the millions of dollars.

Ex Output:
2


Ex Input:
Sentence 1: A brown dog chases a Frisbee Sentence 2: A brown dog squating on grass.

Ex Output:

2