With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Nephrotoxicity
may
be
due
to
proximal
tubules
accumulation
of
Tenofovir
disoproxil
leading
to
elevated
serum
concentrations
.
Nephrotoxicity:O
may:O
be:O
due:O
to:O
proximal:O
tubules:O
accumulation:O
of:O
Tenofovir:other-chemicalthing
disoproxil:other-chemicalthing
leading:O
to:O
elevated:O
serum:O
concentrations:O
.:O