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
upper
level
was
used
only
by
the
King
and
royal
family
.
The:O
upper:O
level:O
was:O
used:O
only:O
by:O
the:O
King:O
and:O
royal:O
family:O
.:O