35745
In 1976 the World Health Organization ( WHO ) publishes the first edition of the International Classification of Diseases for Oncology ( ICD-O ) , now at the third edition ( ICD-O-3 , 2000 ) .
 World Health Organization
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 World Health Organization