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 ":".
Simplification
of
the
design
of
the
Polsten
cannon
made
its
production
much
cheaper
.
Simplification:O
of:O
the:O
design:O
of:O
the:O
Polsten:product-weapon
cannon:product-weapon
made:O
its:O
production:O
much:O
cheaper:O
.:O