TASK DEFINITION: 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.
PROBLEM: Sentence 1: Boeing's board is also expected to decide at its December meeting whether to offer the airplane for sale to airlines. Sentence 2: It is widely expected to give Bair formal approval to offer the plane for sale to airlines.

SOLUTION: 2

PROBLEM: Sentence 1: A man riding a white horse in an arena. Sentence 2: A man riding a white horse.

SOLUTION: 4

PROBLEM: Sentence 1: If it wasn't bollocks it wouldn't be homeopathy. Sentence 2: That's simple logic If it wasn't bollocks it wouldn't be homeopathy.

SOLUTION:
5