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: Experiments are often done in a lab.
answer:
experiment lab.


question:
Fact: Evolution occurs by a process called natural selection.
answer:
evolution changing.


question:
Fact: being burried under soil and mud changes vegetation into peat through extreme heat and pressure in a swamp over a long period of time.
answer:

buried under soil and mud.