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A " Bunsen burner " , named after Robert Bunsen , is a kind of gas burner used as laboratory equipment ; it produces a single open gas flame , and is used for heating , sterilization , and combustion .
 person: Robert Bunsen
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: Robert Bunsen 
Answer:
 person: Robert Bunsen