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 ":".
The
Desert
Eagle
is
fed
with
a
detachable
magazine
.
The:O
Desert:product-weapon
Eagle:product-weapon
is:O
fed:O
with:O
a:O
detachable:O
magazine:O
.:O