4475
METHODS : In October , 1992 , we started a double - blind placebo - controlled , randomised trial of tamoxifen in women ( mainly in Italy ) who did not have breast cancer and who had had a hysterectomy .
 Chemical: tamoxifen; Disease: breast cancer
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:
 Chemical: tamoxifen; Disease: breast cancer