With no explanation, label each line with "product-car", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
This
twin-rotor
engine
was
installed
in
a
BSA
A65
frame
.
This:O
twin-rotor:O
engine:O
was:O
installed:O
in:O
a:O
BSA:product-car
A65:product-car
frame:O
.:O