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two of the four pilots who took control of the planes on 9 / 11 attended a wedding party in hamburg , germany , four years ago 1999 this is .
 geographical social political: hamburg , germany; geographical social political: germany; person: two of the four pilots who took control of the planes on 9 / 11; person: the four pilots who took control of the planes on 9 / 11; person: who; vehicle: the planes
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 geographical social political: hamburg , germany; geographical social political: germany; person: two of the four pilots who took control of the planes on 9 / 11; person: the four pilots who took control of the planes on 9 / 11; person: who; vehicle: the planes