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 ":".
After
an
inactive
period
from
1989
to
1995
,
the
light
is
now
active
again
.
After:O
an:O
inactive:O
period:O
from:O
1989:O
to:O
1995:O
,:O
the:O
light:O
is:O
now:O
active:O
again:O
.:O