Use reasoning to lead to the answer of the following question:
His long walk home wasn't over, he lived on the tenth storey of a walk up what?\nOptions:\n- skyscraper\n- book of stories\n- tall building\n- apartment building\n- mall
 Reasoning process:
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Apartment building was his long walk home. He lived on the tenth storey of an apartment building. Therefore, the final answer is apartment building.
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