With no explanation, label each line with "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Trick-or-treaters
can
be
found
all
throughout
the
town
on
Halloween
,
and
every
year
a
special
``
Christmas
Carol
''
Hayride
is
organized
in
December
.
Trick-or-treaters:O
can:O
be:O
found:O
all:O
throughout:O
the:O
town:O
on:O
Halloween:O
,:O
and:O
every:O
year:O
a:O
special:O
``:event-other
Christmas:event-other
Carol:event-other
'':event-other
Hayride:event-other
is:O
organized:O
in:O
December:O
.:O