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: Little white dog wearing a leash jumping after a red ball. Sentence 2: A black and white dog returns a stick in the snow.
1

Sentence 1: The new study does not support your claim. Sentence 2: The physical evidence does not support your claim.
2

Sentence 1: A young boy in a brown jacket playing with snow. Sentence 2: Two dogs are playing in the snow.

1