With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Major
conventions
are
held
at
McCormick
Place
.
Major:O
conventions:O
are:O
held:O
at:O
McCormick:location-other
Place:location-other
.:O