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It is , however , extremely homologous to a third ' non - classical ' gene , HLA - 5 . 4 , and to the chimpanzee gene , Ch28 .
 GENE: HLA - 5 . 4; GENE: Ch28
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: HLA - 5 . 4; GENE: Ch28