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: Obama moves to fill Fed board, taps Fischer to be No. 2 Sentence 2: Obama voices willingness to talk with GOP on budget
[EX A]: 0

[EX Q]: Sentence 1: Close-up of a hummingbird. Sentence 2: A closeup of a hummingbird flying.
[EX A]: 4

[EX Q]: Sentence 1: A man on a bike nest to a river. Sentence 2: A man on a bike does a very high jump.
[EX A]:
1