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In the 7th century CE , Brahmagupta developed a formula , now known as Brahmagupta 's formula , for the area of a cyclic quadrilateral ( a quadrilateral inscribed in a circle ) in terms of its sides .
 person: Brahmagupta; person: Brahmagupta
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Brahmagupta, Brahmagupta 
Answer:
 person: Brahmagupta; person: Brahmagupta