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Notable organists have included the composer , astronomer and mathematician Thomas Greatorex and founder of the Royal School of Church Music , Sir Sydney Nicholson .
 person: Thomas Greatorex; organization: Royal School of Church Music; person: Sydney Nicholson
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Thomas Greatorex; organization: Royal School of Church Music; person: Sydney Nicholson