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
stadium
hosted
70,000
at
the
time
.
The:O
stadium:O
hosted:O
70,000:O
at:O
the:O
time:O
.:O