61885
She then meets an atheist behaviourist ( with a strong resemblance to Ivan Pavlov ) and a coterie of intellectuals who explain that speculations about God are passé , and that a better quest lies in abstract mathematics .
 Ivan Pavlov
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:
 Ivan Pavlov