With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
I
've
done
that
in
the
past
,
and
I
'll
do
it
in
the
future
.
''
I:O
've:O
done:O
that:O
in:O
the:O
past:O
,:O
and:O
I:O
'll:O
do:O
it:O
in:O
the:O
future:O
.:O
'':O