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.

Sentence 1: A child with his hands on his head. Sentence 2: A little boy stands with his hands on top of his head
4

Sentence 1: The women are sitiing down. Sentence 2: Two women are sitting close to each other and talking.
3

Sentence 1: A man is praying. Sentence 2: A man is running.

1