With no explanation, label each line with "person-soldier", "O", "organization-politicalparty", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
Big
Wing
,
also
known
as
a
Balbo
,
was
an
air
fighting
tactic
proposed
during
the
Battle
of
Britain
by
12
Group
commander
Air
Vice-Marshal
Trafford
Leigh-Mallory
and
Acting
Squadron
Leader
Douglas
Bader
.
The:O
Big:O
Wing:O
,:O
also:O
known:O
as:O
a:O
Balbo:O
,:O
was:O
an:O
air:O
fighting:O
tactic:O
proposed:O
during:O
the:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
Britain:event-attack/battle/war/militaryconflict
by:O
12:organization-politicalparty
Group:organization-politicalparty
commander:O
Air:O
Vice-Marshal:O
Trafford:person-soldier
Leigh-Mallory:person-soldier
and:O
Acting:O
Squadron:O
Leader:O
Douglas:person-soldier
Bader:person-soldier
.:O