With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Simultaneously
,
the
Germans
had
launched
Operation
Luttich
,
a
desperate
and
ill-prepared
armoured
thrust
towards
Mortain
,
beginning
on
6August
1944
.
Simultaneously:O
,:O
the:O
Germans:O
had:O
launched:O
Operation:event-attack/battle/war/militaryconflict
Luttich:event-attack/battle/war/militaryconflict
,:O
a:O
desperate:O
and:O
ill-prepared:O
armoured:O
thrust:O
towards:O
Mortain:O
,:O
beginning:O
on:O
6August:O
1944:O
.:O