With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Biberach
town
was
bombed
on
12
April
,
killing
German
civilians
,
then
on
22
April
French
tanks
following
up
the
German
retreat
passed
by
without
stopping
.
Biberach:location-GPE
town:O
was:O
bombed:O
on:O
12:O
April:O
,:O
killing:O
German:location-GPE
civilians:O
,:O
then:O
on:O
22:O
April:O
French:location-GPE
tanks:O
following:O
up:O
the:O
German:location-GPE
retreat:O
passed:O
by:O
without:O
stopping:O
.:O