tokens: Multiple regulatory elements in the human immunodeficiency virus long terminal repeat ( HIV LTR ) are required for activation of HIV gene expression .
folded_tokens: multiple regulatory elements in the human immunodeficiency virus long terminal repeat ( hiv ltr ) are required for activation of hiv gene expression .
labels: B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O B-virus I-virus I-virus B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region I-DNA_domain_or_region O O O O O O B-other_name I-other_name I-other_name O