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.

Example Input: Fact: Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes.
Example Output: Cytokinesis.

Example Input: Fact: coal is used for generating heat by burning.
Example Output: burning coal pollution.

Example Input: Fact: Flowers attract pollinators, and fruits encourage animals to disperse the seeds.
Example Output:
flower poinsettia.