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Peter Gelderloos estimates that there around 200 squatted buildings and 40 social centres across the city with thousands of inhabitants , making it one of the largest squatter movements in the world .
 person: Peter Gelderloos
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: Peter Gelderloos