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: Tropical Storm Isaac boosts jobless claims Sentence 2: Tropical Storm Joyce forms, stays in open Atlantic
[EX A]: 1

[EX Q]: Sentence 1: A mallard and a tame white duck on the grass near water. Sentence 2: A small child in a pink dress sits on a table.
[EX A]:
0