99756
The American Cancer Society lists tamoxifen as a known carcinogen , stating that it increases the risk of some types of uterine cancer while lowering the risk of breast cancer recurrence .
 American Cancer Society
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:
 American Cancer Society