With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Acetaldehyde
may
be
responsible
for
alcohol-induced
fibrosis
by
stimulating
collagen
deposition
by
hepatic
stellate
cells
.
Acetaldehyde:other-biologything
may:O
be:O
responsible:O
for:O
alcohol-induced:O
fibrosis:O
by:O
stimulating:O
collagen:other-biologything
deposition:O
by:O
hepatic:other-biologything
stellate:other-biologything
cells:other-biologything
.:O