With no explanation, label each line with "product-airplane", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
These
routes
were
commonly
flown
using
Noorduyn
Norseman
and
de
Havilland
Canada
Otter
aircraft
.
These:O
routes:O
were:O
commonly:O
flown:O
using:O
Noorduyn:product-airplane
Norseman:product-airplane
and:O
de:product-airplane
Havilland:product-airplane
Canada:product-airplane
Otter:product-airplane
aircraft:O
.:O