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Erythrocyte - binding antigen - 140 ( PfEBA - 140 / BAEBL ) is a critical EBL ligand that binds sialic acid on its receptor glycophorin C .
 Chemical: sialic acid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: sialic acid