Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
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Question: a modest proposal is a famous work of satire by irish writer jonathan swift.

Answer: a modest proposal

Question: plumbaginaceae is a family of flowering plants are about 560 species in 10 genera found all over the world.

Answer: plumbaginaceae

Question: radwimps (also known as rad) is a japanese rock music group, that started in 2001.

Answer:
radwimps