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Nucleotide sequences between the env gene and the LTR of SFV - 1 were determined .
 GENE: env gene; GENE: LTR of SFV - 1
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: env gene; GENE: LTR of SFV - 1