With no explanation, label each line with "person-soldier", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
the
Battle
,
this
tactic
was
employed
by
the
Duxford
Wing
,
under
Bader
's
command
.
In:O
the:O
Battle:event-attack/battle/war/militaryconflict
,:O
this:O
tactic:O
was:O
employed:O
by:O
the:O
Duxford:O
Wing:O
,:O
under:O
Bader:person-soldier
's:O
command:O
.:O