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
makes
it
useful
in
celestial
navigation
.
This:O
makes:O
it:O
useful:O
in:O
celestial:O
navigation:O
.:O