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Gene 1 of the murine coronavirus , MHV - A59 , encodes approximately 800 kDa of protein products within two overlapping open reading frames ( ORFs 1a and 1b ) .
 GENE: Gene 1 of the murine coronavirus , MHV - A59
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: Gene 1 of the murine coronavirus , MHV - A59