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: heybeliada is an island in sea of marmara in turkey.

Answer: heybeliada

Question: he wrote under the pen name d. h. lawrence.

Answer: d. h. lawrence

Question: merrill cook (born may 6, 1946 in philadelphia, pennsylvania) is an american businessman and politician of the republican party.

Answer:
merrill cook