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reporter : there ' s a huge birthday bash for william at windsor castle , more than 300 guests invited , all ffk , friends of the future king .
 william, more than 300 guests, ffk, friends of the future king, the future king, windsor castle
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 william, more than 300 guests, ffk, friends of the future king, the future king, windsor castle