With no explanation, label each line with "building-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
opened
the
Sands
Expo
and
Convention
Center
across
from
the
hotel
in
1990
.
They:O
opened:O
the:O
Sands:building-other
Expo:building-other
and:building-other
Convention:building-other
Center:building-other
across:O
from:O
the:O
hotel:O
in:O
1990:O
.:O