8845
He established himself in the team in the 1999 – 00 season under Ruud Gullit and later Bobby Robson .
 person: Ruud Gullit; person: Bobby Robson
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: Ruud Gullit; person: Bobby Robson