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Hence the invention of the second-order interpolation formula by Brahmagupta should be placed near the beginning of the second quarter of the 7th century CE , if not earlier . "
 Brahmagupta
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Brahmagupta