With no explanation, label each line with "O", "location-park", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
On
December
21
,
1962
,
Fort
De
Soto
Park
opened
.
On:O
December:O
21:O
,:O
1962:O
,:O
Fort:location-park
De:location-park
Soto:location-park
Park:location-park
opened:O
.:O