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 ":".
Some
hotels
have
been
advertised
as
seven
star
hotels
.
Some:O
hotels:O
have:O
been:O
advertised:O
as:O
seven:O
star:O
hotels:O
.:O