972
Both positive and negative regulatory elements were identified in the proximal 5' flanking region of the IL-3 gene .
 DNA: proximal 5' flanking region; DNA: IL-3 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: proximal 5' flanking region, IL-3 gene 
Answer:
 DNA: proximal 5' flanking region; DNA: IL-3 gene