Given a statement, generate a question such that the answer is contained in that statement.

Example Input: Homo sapiens are placental.
Example Output: Homo sapiens are what?

Example Input: nonvascular plants are autotrophs in aquatic ecosystems
Example Output: What are autotrophs in aquatic ecosystems?

Example Input: Pedigrees are useful tools for studying heredity.
Example Output:
Pedigrees are useful tools for studying what?