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John Preston was an 18th-century luthier in England , known for making English guitar s and cittern s. Preston also claimed to be the inventor of the type of " watchkey " stringed instrument tuners now known as " Preston tuners " , engraving " PRESTON INVENTOR " on the back of his devices ; scholars note the originator could be the luthier John Frederick Hintz , who advertised such a mechanism as early as 1766 .
 person: Preston; person: Preston; person: Preston
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: Preston, Preston, Preston 
Answer:
 person: Preston; person: Preston; person: Preston