With no explanation, label each line with "O", "location-bodiesofwater", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Ordered
to
the
Pacific
,
she
arrived
at
Pearl
Harbor
14
April
1940
.
Ordered:O
to:O
the:O
Pacific:location-bodiesofwater
,:O
she:O
arrived:O
at:O
Pearl:location-other
Harbor:location-other
14:O
April:O
1940:O
.:O