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: island of the blue dolphins is an american book written for children by scott o'dell.

Answer: island of the blue dolphins


Question: the english cocker spaniel is a breed of dog.

Answer: english cocker spaniel


Question: the apollo lunar module (lm) is the spidery-looking landing vehicle on the moon.

Answer:
apollo lunar module