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so we ' re going to have to come up with some conversion technique to create water , to create oxygen and then some way of growing food on the planet itself .
 person: we; location: the planet; location: itself
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
 Entities: we, the planet, itself 
Answer:
 person: we; location: the planet; location: itself