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These proteins , called variant surface glycoproteins ( VSGs ) , are expressed from a specific locus , the VSG gene expression site ( ES ) .
 GENE: variant surface glycoproteins; GENE: VSGs; GENE: VSG gene expression site ( ES )
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: variant surface glycoproteins; GENE: VSGs; GENE: VSG gene expression site ( ES )