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He is the son of Dutch international footballer Martin Koeman , and , alongside his younger brother Ronald , has also represented the Netherlands .
 person: Martin Koeman; person: Ronald; location: Netherlands
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: Martin Koeman; person: Ronald; location: Netherlands