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.

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.
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.