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When Italian rider Gilberto Parlotti was killed during the 1972 TT , his close friend and the reigning world champion Giacomo Agostini , announced that he would never again race on the Isle of Man .
 person: Gilberto Parlotti; person: Giacomo Agostini
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: Gilberto Parlotti; person: Giacomo Agostini