tokens: Live-attenuated human immunodeficiency viruses ( HIVs ) are candidates for Acquired Immunodeficiency Syndrome ( AIDS ) vaccine .
folded_tokens: live-attenuated human immunodeficiency viruses ( hivs ) are candidates for acquired immunodeficiency syndrome ( aids ) vaccine .
labels: B-virus I-virus I-virus I-virus O B-virus O O O O B-other_name I-other_name I-other_name I-other_name I-other_name I-other_name I-other_name O