You are given a sentence and your task is to generate another sentence that supports the given input.

Example Input: and Vertebrata, animals with backbones made up of vertebrae, with about 41,700 species.
Example Output: Vertebrata are characterized by the presence of backbone.

Example Input: As pH goes up the solution becomes more base.
Example Output: As ph increases, a solution becomes more basic.

Example Input: Any time two groups are so different that they can not reproduce to produce healthy fertile offspring, both concepts consider them to be separate species.
Example Output:
If two populations do not mate and produce fertile offspring, separate species result.