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Four-string banjos can be used for chordal accompaniment ( as in early jazz ) , for single-string melody playing ( as in Irish traditional music ) , in " chord melody " style ( a succession of chords in which the highest notes carry the melody ) , in tremolo style ( both on chords and single strings ) , and a mixed technique called duo style that combines single-string tremolo and rhythm chords .
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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:  
Answer:
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