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Together with Olapade Adeniken , Francis Obikwelu and Davidson Ezinwa he won a silver medal in 4 x 100 metres relay at the 1997 World Championships in Athletics .
 person: Olapade Adeniken; person: Francis Obikwelu; person: Davidson Ezinwa
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: Olapade Adeniken, Francis Obikwelu, Davidson Ezinwa 
Answer:
 person: Olapade Adeniken; person: Francis Obikwelu; person: Davidson Ezinwa