128443
Twentieth century yoga gurus such as B. K. S. Iyengar made claims for the effects of yoga on specific organs , without adducing any evidence .
 B. K. S. Iyengar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 B. K. S. Iyengar