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: Cells are the microscopic building blocks of organisms.
answer:
building blocks bricks.


question:
Fact: Lymphocytes are the key cells involved in the immune response.
answer:
Lymphocytes.


question:
Fact: Flagella help prokaryotes move.
answer:

Flagella are.