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 ":".
Boomerangs
can
be
made
for
right-
or
left-handed
throwers
.
Boomerangs:product-weapon
can:O
be:O
made:O
for:O
right-:O
or:O
left-handed:O
throwers:O
.:O