110456
Although Johnston originally performed as a treble , his voice has since matured to tenor , and he is currently not recording , allowing his voice to develop .
 person: Johnston
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: Johnston 
Answer:
 person: Johnston