31599
They killed 16 people over the course of a year , selling the cadavers to the anatomist Robert Knox .
 Robert Knox
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:
 Robert Knox