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Journals which became best-sellers in their day were written , such as Marco Polo 's journal " The Travels of Marco Polo " or Mark Twain 's " Roughing It " .
 person: Marco Polo; person: Mark Twain
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Marco Polo, Mark Twain 
Answer:
 person: Marco Polo; person: Mark Twain