14697
They showed elevated levels of p53 and p21 ( cip1 ) and increased regulation of RB2 / P130 and P107 expression .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None