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 modern gymnosperms are trees with woody trunks.
answer:
gymnosperm is a.


question:
Fact: Birds evolved from a group of bipedal dinosaurs called theropods.
answer:
Birds evolved.


question:
Fact: temperature changing can cause phase changes.
answer:

: temperature heat.