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
blue
cloth
floats
behind
them
and
onto
the
surrounding
clouds
.
The:O
blue:O
cloth:O
floats:O
behind:O
them:O
and:O
onto:O
the:O
surrounding:O
clouds:O
.:O