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: A man drove his car. Sentence 2: A man is driving a car.
[EX A]: 4

[EX Q]: Sentence 1: Under NASD regulations, Mr. Young can file a response and request a hearing before an NASD panel. Sentence 2: The analyst, already let go by Merrill, can request a hearing before a NASD panel.
[EX A]: 3

[EX Q]: Sentence 1: that is not an answer. Sentence 2: no, it's not an answer.
[EX A]:
5