With no explanation, label each line with "location-GPE", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
At
the
outbreak
of
the
Second
World
War
the
unit
was
flying
Westland
Lysanders
.
At:O
the:O
outbreak:O
of:O
the:O
Second:event-attack/battle/war/militaryconflict
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
the:O
unit:O
was:O
flying:O
Westland:location-GPE
Lysanders:location-GPE
.:O