67150
Noted for its castle-like appearance and eccentric , unplanned design , the building was home to a one-doctor hospital operated by retired U.S. Army physician Fred Stone , Sr. ( 1887 – 1976 ) in the 1940s , 1950s , and 1960s .
 Stone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stone