With no explanation, label each line with "person-athlete", "event-sportsevent", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Kiekhaefer
participated
in
the
1952
and
1953
Carrera
Panamericana
.
Kiekhaefer:person-athlete
participated:O
in:O
the:O
1952:O
and:O
1953:O
Carrera:event-sportsevent
Panamericana:event-sportsevent
.:O