8701
Rhesus macaques and BALB / c mice inoculated with the Mengo virus SIV recombinants failed to develop CTL responses against the SIV gene products , while one of the HIV - Nef recombinants induced a weak CTL response in mice directed to an HIV1 Nef peptide spanning positions 182 - 198 .
 GENE: HIV - Nef recombinants; GENE: HIV1 Nef peptide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: HIV - Nef recombinants, HIV1 Nef peptide 
Answer:
 GENE: HIV - Nef recombinants; GENE: HIV1 Nef peptide