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

[Q]: statement: ozone contains particulates, question: What does ozone contain?
[A]: particulates


[Q]: statement: Smog has been linked with lung disease., question: Smog has been linked to what?
[A]: lung disease


[Q]: statement: simple green plants play significant roles as producers in water ecosystems, question: What ecosystems do green plants play a significant role in?
[A]:
water ecosystems