19914
Silencing IGFBP - 2 had no effect on the response to IGF - II , but responses to estrogen and tamoxifen were no longer observed due to loss of ER - alpha , which could be prevented by the inhibition of PTEN .
 Chemical: estrogen; Chemical: tamoxifen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: estrogen; Chemical: tamoxifen