Given a scientific question, generate a correct answer to it.

Ex Input:
What is the first phase of mitosis?

Ex Output:
prophase

Ex Input:
What performance-enhancing drugs are synthetic versions of the male sex hormone, testosterone?

Ex Output:
anabolic steroids

Ex Input:
A rusty bike has been left outside in damp weather too many times, so the iron in the metal parts have?

Ex Output:
rusted