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Biography In January 2002 , while a junior in high school , Gallivan demonstrated that a single piece of toilet paper 4000 ft ( 1200 m ) in length can be folded in half twelve times .
 person: Gallivan
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: Gallivan 
Answer:
 person: Gallivan