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 ":".
The
campaign
marked
the
wing
's
last
major
operation
.
The:O
campaign:O
marked:O
the:O
wing:O
's:O
last:O
major:O
operation:O
.:O