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Alexander Shafto " Sandy " Douglas CBE ( 21 May 1921 – 29 April 2010 ) was a British professor of computer science , credited with creating the first graphical computer game OXO ( also known as Noughts and Crosses ) a tic-tac-toe computer game in 1952 on the EDSAC computer at University of Cambridge .
 person: Sandy; person: Douglas; organization: University of Cambridge
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: Sandy; person: Douglas; organization: University of Cambridge