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: a telescope is used for observing stars by astronomers.
answer:
astronomer study.


question:
Fact: magnetism can cause objects to repel each other.
answer:
electricity causes magnet fields.


question:
Fact: when an electrical circuit is working properly , electrical current runs through that circuit.
answer:

Circuits are made of.