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His " Poison Ivy " was recorded by Willie Mabon and reached # 7 in the Billboard R&B chart in 1954 .
 person: Willie Mabon
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: Willie Mabon 
Answer:
 person: Willie Mabon