tokens: Epstein-Barr virus ( EBV ) , the causative agent of infectious mononucleosis , is a human herpesvirus associated with epithelial cell malignancies ( nasopharyngeal carcinoma ) as well as B-cell malignancies .
folded_tokens: epstein-barr virus ( ebv ) , the causative agent of infectious mononucleosis , is a human herpesvirus associated with epithelial cell malignancies ( nasopharyngeal carcinoma ) as well as b-cell malignancies .
labels: B-virus I-virus O B-virus O O O O O O B-other_name I-other_name O O O B-virus I-virus O O B-other_name I-other_name I-other_name O B-other_name I-other_name O O O O B-other_name I-other_name O