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
complex
contained
of
office
space
.
The:O
complex:O
contained:O
of:O
office:O
space:O
.:O