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 ":".
The
Dutch
decision
not
to
declare
Rotterdam
an
open
city
played
a
part
in
the
attack
.
The:O
Dutch:location-GPE
decision:O
not:O
to:O
declare:O
Rotterdam:location-GPE
an:O
open:O
city:O
played:O
a:O
part:O
in:O
the:O
attack:O
.:O