6116
A cDNA clone was isolated from a chicken embryo cDNA library employing a PCR - generated radiolabeled probe specific for the U3 region of the Rous sarcoma virus LTR .
 GENE: U3 region; GENE: Rous sarcoma virus LTR
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: U3 region, Rous sarcoma virus LTR 
Answer:
 GENE: U3 region; GENE: Rous sarcoma virus LTR