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 ":".
The
F-111
was
the
first
production
variable-geometry
wing
aircraft
.
The:O
F-111:product-airplane
was:O
the:O
first:O
production:O
variable-geometry:O
wing:O
aircraft:O
.:O