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As such , the area has been developed for access to Lake Powell via five marinas , four public campgrounds , two small airports , and numerous houseboat rental concessions .
 location: Lake Powell
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Lake Powell