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 ":".
They
placed
4th
at
the
1965
U.S.
Championships
.
They:O
placed:O
4th:O
at:O
the:O
1965:O
U.S.:event-sportsevent
Championships:event-sportsevent
.:O