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: tin foil hat for the dog face, what size do u wear? Sentence 2: tin foil hat for the sarg, what size do u wear?
[EX A]: 3

[EX Q]: Sentence 1: Cisco executives said they were encouraged by $1.3 billion in cash flow and the increase in net income, but hoped for a rebound. Sentence 2: Cisco executives were encouraged by $1.3 billion in cash flow and the increase in net income, but said they remained ``cautiously optimistic'' about a rebound.
[EX A]: 5

[EX Q]: Sentence 1: Polls close in Egyptian presidential election Sentence 2: Press Releases: Yemeni Presidential Election
[EX A]:
1