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

statement: acetate changes the color of litmus paper from blue to red, question: What color does acetate change the color of litmus paper?
blue

statement: Sseperates heal when osteoclasts form new bone., question: When do Sseperates heal?
osteoclasts

statement: placental mammals give birth to vulnerable young, question: What are placental mammals?

vulnerable young