8592
Position - independent expression of a human nerve growth factor - luciferase reporter gene cloned on a yeast artificial chromosome vector .
 GENE: nerve growth factor; GENE: luciferase
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: nerve growth factor, luciferase 
Answer:
 GENE: nerve growth factor; GENE: luciferase