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: Man standing in front of silver train. Sentence 2: Man standing in front of a silver rail car.

SOLUTION: 4

PROBLEM: Sentence 1: A cruise liner docked at the shoreline. Sentence 2: A cruise ship docked at shore.

SOLUTION: 4

PROBLEM: Sentence 1: But software license revenues, a measure financial analysts watch closely, decreased 21 percent to $107.6 million. Sentence 2: License sales, a key measure of demand, fell 21 percent to $107.6 million.

SOLUTION:
5