TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: the proportion of c-types may actually be greater than this , because c-types are much darker than most other asteroid types except d-types and others common only at the extreme outer edge of the main belt.

SOLUTION: the portion of c-types may actually be greater than this , because c-types are much darker than most other asteroid types except d-types and others common only at the extreme outer edge of the main belt.

PROBLEM: mercury is similar in appearance to the moon : it is heavily cratered with regions of smooth plains , has no natural satellites and no substantial atmosphere.

SOLUTION: mercury , which looks like the moon with its many craters and areas of smoothness , has no orbiting bodies around it and a minimal atmosphere.

PROBLEM: it had maximum sustained winds of , and a minimum pressure of 1002 mbar.

SOLUTION:
it had maximum sustained winds and a minimum pressure of 1002 mbar.