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
was
listed
on
the
National
Register
of
Historic
Places
in
1999
.
It:O
was:O
listed:O
on:O
the:O
National:O
Register:O
of:O
Historic:O
Places:O
in:O
1999:O
.:O