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 ":".
The
Battle
of
France
,
the
German
invasion
of
France
and
the
Low
Countries
,
began
on
10
May
1940
.
The:O
Battle:event-attack/battle/war/militaryconflict
of:event-attack/battle/war/militaryconflict
France:event-attack/battle/war/militaryconflict
,:O
the:O
German:location-GPE
invasion:O
of:O
France:location-GPE
and:O
the:O
Low:O
Countries:O
,:O
began:O
on:O
10:O
May:O
1940:O
.:O