6129
It was not possible to study the basis for tissue - specific expression of this gene , because the beta 3 gene promoter had not been isolated previously .
 GENE: beta 3 gene promoter
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: beta 3 gene promoter 
Answer:
 GENE: beta 3 gene promoter