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Gregory 's series , also known as the Madhava-Gregory series or Leibniz 's series , is a mathematical series that was discovered by the Indian mathematician Madhava of Sangamagrama ( 1350 - 1410 ) .
 person: Gregory; person: Madhava of Sangamagrama
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: Gregory, Madhava of Sangamagrama 
Answer:
 person: Gregory; person: Madhava of Sangamagrama