With no explanation, label each line with "building-library", "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Denver
Public
Library
is
the
public
library
system
of
the
City
and
County
of
Denver
,
Colorado
.
The:O
Denver:building-library
Public:building-library
Library:building-library
is:O
the:O
public:O
library:O
system:O
of:O
the:O
City:O
and:O
County:O
of:O
Denver:location-GPE
,:O
Colorado:location-GPE
.:O