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 ":".
This
work
begun
in
1897
.
This:O
work:O
begun:O
in:O
1897:O
.:O