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: the emission of sulfur dioxide causes acid rain.
answer:
acid rain causes.


question:
Fact: an animal needs to attract a mate to reproduce.
answer:
animal birth young.


question:
Fact: DNA replication is the process in which DNA is copied.
answer:

DNA acid.