With no explanation, label each line with "O", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
station
is
also
serviced
by
several
Greyhound
bus
routes
.
The:O
station:O
is:O
also:O
serviced:O
by:O
several:O
Greyhound:location-road/railway/highway/transit
bus:O
routes:O
.:O