With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
At
11:57PM
on
March
12
,
1928
,
the
dam
catastrophically
failed
,
and
the
resulting
flood
took
the
lives
of
as
many
as
400
people
.
At:O
11:57PM:O
on:O
March:O
12:O
,:O
1928:O
,:O
the:O
dam:O
catastrophically:O
failed:O
,:O
and:O
the:O
resulting:O
flood:O
took:O
the:O
lives:O
of:O
as:O
many:O
as:O
400:O
people:O
.:O