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
game
is
played
from
a
first-person
perspective
and
requires
the
NES
Zapper
light
gun
,
which
the
player
aims
and
fires
at
the
screen
.
The:O
game:O
is:O
played:O
from:O
a:O
first-person:O
perspective:O
and:O
requires:O
the:O
NES:product-weapon
Zapper:product-weapon
light:product-weapon
gun:product-weapon
,:O
which:O
the:O
player:O
aims:O
and:O
fires:O
at:O
the:O
screen:O
.:O