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 woman is slipping in the water-tub. Sentence 2: A woman is lying in a raft.

A: 1
****
Q: Sentence 1: The hedgehog chewed on the towel. Sentence 2: A hedgehog is biting at a blanket.

A: 3
****
Q: Sentence 1: A man riding a small bicycle. Sentence 2: A man is doing a wheelie on a bike.

A:
3
****