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We sought to test whether p53 could behave in a manner similar to known genes in a biological test system , and we demonstrate here that p53 can cooperate with the activated Ha - ras oncogene to transform normal embryonic cells .
 Anatomy: embryonic cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: embryonic cells