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In contrast , artists such as Don Williams and George Jones who had more or less had consistent chart success through the 1970 s and 1980 s suddenly had their fortunes fall rapidly around 1991 when the new chart rules took effect .
 person: Don Williams; person: George Jones
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: Don Williams, George Jones 
Answer:
 person: Don Williams; person: George Jones