With no explanation, label each line with "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Upon
hearing
the
bells
,
the
American
command
rescinded
the
order
for
destruction
.
Upon:O
hearing:O
the:O
bells:O
,:O
the:O
American:person-other
command:O
rescinded:O
the:O
order:O
for:O
destruction:O
.:O