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 ":".
The
dark
color
was
chosen
to
counteract
the
otherwise
lively
array
of
colors
in
the
surroundings
.
The:O
dark:O
color:O
was:O
chosen:O
to:O
counteract:O
the:O
otherwise:O
lively:O
array:O
of:O
colors:O
in:O
the:O
surroundings:O
.:O