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 hamburger is a type of sandwich with cooked ground meat between the two halves of a bun.

Answer: hamburger

Question: orvon grover autry (september 29, 1907 october 2, 1998), better known as gene autry was an american movie actor and a singer.

Answer: gene autry

Question: fufu (pounded yam or cassava) is a food dish which first came from west africa, but is enjoyed by many people across the world.

Answer:
fufu