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

Input: Consider Input: statement: The flu is not affected by drugs, only a vaccine, question: What is the only drug that affects the flu?

Output: vaccine


Input: Consider Input: statement: Cystitis can be treated with drugs prescribed by a doctor., question: What can be treated with drugs prescribed by a doctor?

Output: Cystitis


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


Output: h2o