69453
" became the world 's third-most expensive artwork when its owner , the family of Rudolf Staechelin , sold it privately for US $ 210 " million in September 2014 .
 Rudolf Staechelin
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:
 Rudolf Staechelin