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 ":".
It
has
been
operational
since
1999
.
It:O
has:O
been:O
operational:O
since:O
1999:O
.:O