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.

[EX Q]: Sentence 1: Ex-first lady Barbara Bush leaves Texas hospital Sentence 2: Former first lady Barbara Bush leaves hospital
[EX A]: 5

[EX Q]: Sentence 1: Black bird sitting on a concrete slab. Sentence 2: Small dog sitting next to white wall.
[EX A]: 1

[EX Q]: Sentence 1: Two kids are playing in a swimming pool with a green colored crocodile float. Sentence 2: Two kids push an inflatable crocodile around in a pool.
[EX A]:
4