instruction:
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.
question:
Fact: Most pituitary hormones control other endocrine glands.
answer:
Endocrine glands are.


question:
Fact: Hydrogen bonds cause water to expand when it freezes.
answer:
freezes.


question:
Fact: using a car causes pollution.
answer:

car brand.