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.

Q: Sentence 1: A close-up of a sheep with its tongue hanging out. Sentence 2: Close up image of a sheep with it's tongue hanging out.

A: 5
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Q: Sentence 1: Two cows standing in a large field. Sentence 2: Horse standing in a field.

A: 2
****
Q: Sentence 1: A motorcyclist crashes on his motorcycle. Sentence 2: A person crashes on a motorcycle.

A:
4
****