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The vaccinia virus D6R open reading frame encodes the small subunit of the heterodimeric vaccinia virus early transcription factor ( VETF ) that activates transcription of early genes in vitro .
 GENE: D6R; GENE: vaccinia virus early transcription factor; GENE: VETF; GENE: early genes
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: D6R; GENE: vaccinia virus early transcription factor; GENE: VETF; GENE: early genes