With no explanation, label each line with "event-attack/battle/war/militaryconflict", "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Aircraft
of
different
types
,
including
the
Shenyang
F-6
,
were
operated
from
the
base
during
the
1971
Indo-Pak
War
.
Aircraft:O
of:O
different:O
types:O
,:O
including:O
the:O
Shenyang:product-weapon
F-6:product-weapon
,:O
were:O
operated:O
from:O
the:O
base:O
during:O
the:O
1971:O
Indo-Pak:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
.:O