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.

Q: Sentence 1: A girl makes up her bed. Sentence 2: A young girl makes her bed.

A: 4
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Q: Sentence 1: A mostly black train on a track. Sentence 2: A car parked in front of train tracks.

A: 1
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Q: Sentence 1: Tech stocks were hurt by a sour forecast from Sun Microsystems, which was viewed as a bad omen for the upcoming quarterly earnings season. Sentence 2: A sour forecast from Sun Microsystems Inc. SUNW.O put more pressure on Wall Street before the quarterly earnings season.

A:
3
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