In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Fact: coal is used to produce electricity by burning in coal-fire power stations.
Electricity is energy.

Fact: loud noises can cause animals to startle.
animals mammal.

Fact: bacteria cause food to spoil.

bacteria spoil.