With no explanation, label each line with "organization-other", "location-GPE", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Operation
Crusader
was
launched
by
the
British
Eighth
Army
between
18
November–30
December
1941
,
with
the
objective
of
relieving
the
siege
of
Tobruk
.
Operation:event-attack/battle/war/militaryconflict
Crusader:event-attack/battle/war/militaryconflict
was:O
launched:O
by:O
the:O
British:organization-other
Eighth:organization-other
Army:organization-other
between:O
18:O
November–30:O
December:O
1941:O
,:O
with:O
the:O
objective:O
of:O
relieving:O
the:O
siege:O
of:O
Tobruk:location-GPE
.:O