3921
The more pronounced effects of Bmi - 1 over - expression in culture were largely attributable to the attenuated induction of p16 ( Ink4a ) and p19 ( Arf ) in culture , proteins that are generally not expressed by neural stem / progenitor cells in young mice in vivo .
 Anatomy: neural stem / progenitor cells
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: neural stem / progenitor cells 
Answer:
 Anatomy: neural stem / progenitor cells