With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
His
first
marathon
was
the
Pittsburgh
Marathon
in
1994
.
His:O
first:O
marathon:O
was:O
the:O
Pittsburgh:event-sportsevent
Marathon:event-sportsevent
in:O
1994:O
.:O