9240
Here we present evidence that a member(s) of the family of basic helix loop helix (bHLH) transcription factors determines lineage specification of NK/T cell progenitors .
 protein: basic helix loop helix (bHLH) transcription factors; cell type: NK/T cell progenitors
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: basic helix loop helix (bHLH) transcription factors, NK/T cell progenitors 
Answer:
 protein: basic helix loop helix (bHLH) transcription factors; cell type: NK/T cell progenitors