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In the present experiment, we examined the effect of nm23 proteins on various differentiation induction systems of human leukemic cells including HL-60 , U937 , HEL/S , KU812F , K562 , and HEL cells .
 cell line: HL-60; cell line: KU812F; cell line: HEL/S; cell line: U937; cell line: K562; cell line: HEL; cell type: human leukemic cells; protein: nm23 proteins
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: HL-60, KU812F, HEL/S, U937, K562, HEL, human leukemic cells, nm23 proteins 
Answer:
 cell line: HL-60; cell line: KU812F; cell line: HEL/S; cell line: U937; cell line: K562; cell line: HEL; cell type: human leukemic cells; protein: nm23 proteins