297
Incubation of Jurkat , CEM , HeLa , and MCF - 7 cancer cells with HCE at 125 micro g / mL for 72 h caused 93 . 7 % , 32 . 3 % , 20 . 4 % and 40 . 4 % reduction in cell survival .
 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