12352
To determine the mechanisms responsible for these differences, we turned to human U937 promonocytic cells .
 cell line: human U937 promonocytic 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: human U937 promonocytic cells 
Answer:
 cell line: human U937 promonocytic cells