14361
In order to apprehend the role of the HIV1 tat gene in inducing the differentiation of HIV1 -infected U937 cells , we have successfully introduced this gene into U937 cells by infecting them with retroviral particles transducing tat .
 cell line: U937 cells; DNA: tat; cell line: U937 cells; cell line: HIV1 -infected U937 cells; DNA: HIV1 tat gene
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: U937 cells, tat, U937 cells, HIV1 -infected U937 cells, HIV1 tat gene 
Answer:
 cell line: U937 cells; DNA: tat; cell line: U937 cells; cell line: HIV1 -infected U937 cells; DNA: HIV1 tat gene