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 ":".
On
December
27
,
they
founded
a
branch
in
Shanghai
.
On:O
December:O
27:O
,:O
they:O
founded:O
a:O
branch:O
in:O
Shanghai:location-GPE
.:O