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They chose a site north of the Sassanid capital of Ctesiphon , and on 30 July 762 the caliph Al-Mansur commissioned the construction of the city .
 location: Ctesiphon; person: Al-Mansur
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:
 location: Ctesiphon; person: Al-Mansur