With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Dongfeng-Citroen
Automobile
Co.
,
Ltd
is
headquartered
in
the
city
.
Dongfeng-Citroen:O
Automobile:O
Co.:O
,:O
Ltd:O
is:O
headquartered:O
in:O
the:O
city:O
.:O