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 ":".
Its
area
was
3580
km²
around
1910
.
Its:O
area:O
was:O
3580:O
km²:O
around:O
1910:O
.:O