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 ":".
Competition
took
place
in
the
Fencing
Hall
at
the
Helliniko
Olympic
Complex
on
August
17
.
Competition:O
took:O
place:O
in:O
the:O
Fencing:building-sportsfacility
Hall:building-sportsfacility
at:building-sportsfacility
the:building-sportsfacility
Helliniko:building-sportsfacility
Olympic:building-sportsfacility
Complex:building-sportsfacility
on:O
August:O
17:O
.:O