With no explanation, label each line with "event-attack/battle/war/militaryconflict", "O", "organization-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
1938
,
Red
Army
snipers
took
part
in
the
Battle
of
Lake
Khasan
against
troops
of
the
Imperial
Japanese
Army
.
In:O
1938:O
,:O
Red:organization-other
Army:organization-other
snipers:O
took:O
part:O
in:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Lake:event-attack/battle/war/militaryconflict
Khasan:event-attack/battle/war/militaryconflict
against:O
troops:O
of:O
the:O
Imperial:organization-other
Japanese:organization-other
Army:organization-other
.:O