8955
To further understand the role of cis - acting elements in these regulatory mechanisms , we have characterized a transcriptional promoter that drives germline expression of TCR beta gene segments in vivo .
 GENE: TCR beta gene segments
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: TCR beta gene segments 
Answer:
 GENE: TCR beta gene segments