With no explanation, label each line with "O", "person-athlete", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
Athens
2004
Olympics
Forbes
,
aged
38
,
was
the
oldest
trampolining
competitor
.
At:O
the:O
Athens:event-sportsevent
2004:event-sportsevent
Olympics:event-sportsevent
Forbes:person-athlete
,:O
aged:O
38:O
,:O
was:O
the:O
oldest:O
trampolining:O
competitor:O
.:O