1374
Both STX243 and STX140 were capable of retarding the growth of MDA - MB - 231 xenograft tumours ( 72 and 63 % , respectively ) , whereas no inhibition was observed for animals treated with 2 - MeOE2 .
 Anatomy: MDA - MB - 231 xenograft tumours
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
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Answer:
 Anatomy: MDA - MB - 231 xenograft tumours