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
roof
was
built
using
laminated
wood
lattice
girders
.
The:O
roof:O
was:O
built:O
using:O
laminated:O
wood:O
lattice:O
girders:O
.:O