3483
We previously described the isolation of non - tumorigenic revertants from mutagenized populations of v - fos - transformed Rat - 1 cells ( Zarbl et al . , 1987 ) .
 Anatomy: revertants; Anatomy: populations; Anatomy: Rat - 1 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: revertants; Anatomy: populations; Anatomy: Rat - 1 cells