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He returned to action in April 2000 , but was mainly a backup to Ronald Waterreus and Patrick Lodewijks , as the club convincingly won the domestic league in his debut season at Philips Stadion .
 Ronald Waterreus, Patrick Lodewijks, Philips Stadion
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ronald Waterreus, Patrick Lodewijks, Philips Stadion