With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Some
stations
may
also
have
a
deployed
K9
bomb-sniffing
dog
.
Some:O
stations:O
may:O
also:O
have:O
a:O
deployed:O
K9:product-weapon
bomb-sniffing:O
dog:O
.:O