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 ":".
Ceilings
have
frequently
been
decorated
with
fresco
painting
,
mosaic
tiles
and
other
surface
treatments
.
Ceilings:O
have:O
frequently:O
been:O
decorated:O
with:O
fresco:O
painting:O
,:O
mosaic:O
tiles:O
and:O
other:O
surface:O
treatments:O
.:O