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
ecoregion
covers
an
area
of
,
lying
above
elevation
.
The:O
ecoregion:O
covers:O
an:O
area:O
of:O
,:O
lying:O
above:O
elevation:O
.:O