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 ":".
Lightning
from
the
storm
caused
two
injuries
.
Lightning:O
from:O
the:O
storm:O
caused:O
two:O
injuries:O
.:O