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: Ribosomes are sites where proteins are made.
answer:
Proteins are large biomolecules.


question:
Fact: fog is formed by water vapor condensing in the air.
answer:
fog is formed.


question:
Fact: lakes are formed by precipitation and runoff.
answer:

caspian sea lake.