11728
Cellular redox status influences both cytotoxic and NF-kappa B activation in natural killer cells .
 cell type: natural killer cells
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: natural killer cells 
Answer:
 cell type: natural killer cells