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 ":".
HIV
is
dependent
on
a
proteolytic
enzyme
called
the
HIV-1
protease
for
it
to
become
fully
infectious
.
HIV:other-biologything
is:O
dependent:O
on:O
a:O
proteolytic:other-biologything
enzyme:other-biologything
called:O
the:O
HIV-1:other-biologything
protease:other-biologything
for:O
it:O
to:O
become:O
fully:O
infectious:O
.:O