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 dog is jumping up in the air to catch a toy. Sentence 2: A black dog jumps in the air to catch a toy.

A: 4
****
Q: Sentence 1: Revenues for "The Hulk" came in well below those of last month's Marvel Comics adaptation, "X2: X-Men United," which grossed $85.6 million in its opening weekend. Sentence 2: The Hulk trailed last month's Marvel Comics adaptation, X2: X-Men United, which grossed $85.6-million in its opening weekend.

A: 5
****
Q: Sentence 1: A white sheep on a hillside looking at the camera. Sentence 2: The skinny cows are standing on the grass.

A:
1
****