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

statement: FM systems are used for entertainment, question: What are used for entertainment?
FM systems

statement: pollution can penetrate deep into lungs., question: What can pollution penetrate deep into?
lungs

statement: Therapsids became more mammal-like as they continued to change., question: What became more mammal-like as they continued to change?

Therapsids