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 ":".
He
was
born
in
Germany
and
,
given
the
social
tensions
generated
by
World
War
I
,
it
is
understandable
he
chose
to
retire
in
the
1917
election
.
He:O
was:O
born:O
in:O
Germany:location-GPE
and:O
,:O
given:O
the:O
social:O
tensions:O
generated:O
by:O
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
I:event-attack/battle/war/militaryconflict
,:O
it:O
is:O
understandable:O
he:O
chose:O
to:O
retire:O
in:O
the:O
1917:O
election:O
.:O