2244
By progressive 5 ' - deletion studies , we have identified a 248 - bp DNA fragment ( - 1018 to - 771 , relative to the translation start site ) at the 5 ' - flanking region of the human GnRHR gene that is responsible for the GnRHa - mediated down - regulation of human GnRHR promoter activity .
 GENE: human GnRHR gene; GENE: human GnRHR promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: human GnRHR gene; GENE: human GnRHR promoter