You are given a sentence and a question. You're expected to write the correct answer based on the sentence.

Let me give you an example: Sentence: Jacob and Benny are squatting at the gym. Jacob has thin frail legs and Benny has big strong legs. Question: Who squats less weight?
The answer to this example can be: Jacob
Here is why: Typically, people with thin frail legs squat less weight than people with big strong legs, so the answer is Jacob.

OK. solve this:
Sentence: Lucy could see smoke in the distance. She heard a fire engine's siren and it sounded loud. Then she heard the sirens from a police car, but the sound was much harder to hear. Question: Which was closer to Lucy?
Answer:
the fire engine