With no explanation, label each line with "location-GPE", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Minigun
is
used
by
several
branches
of
the
U.S
.
military
.
The:O
Minigun:product-weapon
is:O
used:O
by:O
several:O
branches:O
of:O
the:O
U.S:location-GPE
.:location-GPE
military:O
.:O