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.

Example Input: Sentence 1: A young child rides a horse. Sentence 2: The little girl rode a horse.
Example Output: 3

Example Input: Sentence 1: And yes, Marilyn Monroe is definitely part of the story, titled "Arthur Miller, Elia Kazan and the Blacklist: None Without Sin." Sentence 2: Note the subheading of this terrible parable in the "American Masters" series, "Arthur Miller, Elia Kazan and the Blacklist: None Without Sin."
Example Output: 3

Example Input: Sentence 1: The Nasdaq fell about 1.3% for the month, snapping a seven-month winning streak. Sentence 2: The Nasdaq is down roughly 0.4 percent for the month, on track to snap a 7-month streak of gains.
Example Output:
2