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Others who wrote in a similar vein included Reginald de Koven , John Philip Sousa , Sigmund Romberg and Rudolf Friml .
 person: Reginald de Koven; person: John Philip Sousa; person: Sigmund Romberg; person: Rudolf Friml
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Reginald de Koven; person: John Philip Sousa; person: Sigmund Romberg; person: Rudolf Friml