With no explanation, label each line with "location-GPE", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
most
successful
Soviet
use
of
snipers
during
the
second
world
war
was
during
their
defensive
stages
(
1941–1943
)
,
after
which
the
advantage
of
defense
shifted
to
the
German
side
and
German
snipers
became
a
real
danger
to
the
advancing
Soviets
.
The:O
most:O
successful:O
Soviet:location-GPE
use:O
of:O
snipers:O
during:O
the:O
second:event-attack/battle/war/militaryconflict
world:event-attack/battle/war/militaryconflict
war:event-attack/battle/war/militaryconflict
was:O
during:O
their:O
defensive:O
stages:O
(:O
1941–1943:O
):O
,:O
after:O
which:O
the:O
advantage:O
of:O
defense:O
shifted:O
to:O
the:O
German:location-GPE
side:O
and:O
German:location-GPE
snipers:O
became:O
a:O
real:O
danger:O
to:O
the:O
advancing:O
Soviets:location-GPE
.:O