1372
The sequences of two previously known tail genes , R and S , of the temperate bacteriophage P2 and the sequence of an additional open reading frame ( orf - 30 ) located between S and V , were determined .
 GENE: tail genes; GENE: R; GENE: S; GENE: S; GENE: V
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: tail genes; GENE: R; GENE: S; GENE: S; GENE: V