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Mustafa Kamal Mahmoud Husayn ( ) ( 25 December 1921 – 31 October 2009 ) commonly known as Mustafa Mahmud ( ) was an Egyptian scientist and a prolific author .
 person: Mustafa; person: Mustafa Mahmud
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: Mustafa; person: Mustafa Mahmud