4487
INTERPRETATION : Although this preliminary analysis has low power , in this cohort of women at low - to - normal risk of breast cancer , the postulated protective effects of tamoxifen are not yet apparent .
 Disease: breast cancer; Chemical: tamoxifen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: breast cancer; Chemical: tamoxifen