With no explanation, label each line with "O", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
His
widow
and
two
children
survived
the
Nazi
period
,
probably
because
they
were
helped
by
neighbors
in
the
``
Altstadt
``
.
His:O
widow:O
and:O
two:O
children:O
survived:O
the:O
Nazi:O
period:O
,:O
probably:O
because:O
they:O
were:O
helped:O
by:O
neighbors:O
in:O
the:O
``:O
Altstadt:location-other
``:O
.:O