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: platinum is a soft, heavy, white metal.

Answer: platinum


Question: the first and only written biography of doug henning, "spellbound: the wonder-filled life of doug henning" was published in 2009 (john harrison, boxoffice books, new york.)

Answer: doug henning


Question: g-unit is a hip hop group from new york.

Answer:
g-unit