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
first
was
built
in
1973
,
but
only
had
a
gravel
runway
.
The:O
first:O
was:O
built:O
in:O
1973:O
,:O
but:O
only:O
had:O
a:O
gravel:O
runway:O
.:O