6607
Gene targeting studies have demonstrated crucial roles for the transcription factors Ikaros and Aiolos in regulating multiple stages of B and T cell development .
 protein: transcription factors; protein: Aiolos; protein: Ikaros
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: transcription factors, Aiolos, Ikaros 
Answer:
 protein: transcription factors; protein: Aiolos; protein: Ikaros