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: Marine species live mainly in shallow coastal waters.
answer:
Marine means.


question:
Fact: when a hurricane moves over land , that hurricane will decrease in strength.
answer:
continents are land.


question:
Fact: Placental mammals are the dominant land mammals.
answer:

Placental mammals.