With no explanation, label each line with "O", "building-hotel", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
building
was
sold
to
an
investment
company
which
also
owns
the
adjacent
Dallas
Statler
Hilton
,
but
the
building
has
remained
vacant
since
the
library
's
departure
.
The:O
building:O
was:O
sold:O
to:O
an:O
investment:O
company:O
which:O
also:O
owns:O
the:O
adjacent:O
Dallas:building-hotel
Statler:building-hotel
Hilton:building-hotel
,:O
but:O
the:O
building:O
has:O
remained:O
vacant:O
since:O
the:O
library:O
's:O
departure:O
.:O