With no explanation, label each line with "O", "building-sportsfacility", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Closing
ceremonies
and
outdoor
events
(
mainly
track
and
field
)
took
place
at
Centennial
Park
Stadium
.
Closing:O
ceremonies:O
and:O
outdoor:O
events:O
(:O
mainly:O
track:O
and:O
field:O
):O
took:O
place:O
at:O
Centennial:building-sportsfacility
Park:building-sportsfacility
Stadium:building-sportsfacility
.:O