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

statement: researchers study dinosaur fossils, question: What do researchers study?
dinosaur fossils

statement: h2o is essential for all plants on Earth, question: What is essential for all plants on Earth?
h2o

statement: Pencil lead is from a hard mineral., question: What type of mineral does pencil lead come from?

hard