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Here we utilize transgenic and allograft breast cancer models to demonstrate that increased mammalian target of rapamycin ( mTOR ) signalling can be a significant contributor to breast cancer progression in vivo .
 Chemical: rapamycin
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: rapamycin