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More than 30 years ago , Prof. Harold Hill , the con man in Meredith Willson 's `` The Music Man , '' warned the citizens of River City , Iowa , against the game .
 date: 30 years ago; person: Harold Hill; person: Meredith Willson 's; work of art: The Music Man; geographical social political: River City; geographical social political: Iowa
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 date: 30 years ago; person: Harold Hill; person: Meredith Willson 's; work of art: The Music Man; geographical social political: River City; geographical social political: Iowa