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 ":".
It
was
the
only
entry
in
the
series
to
dispense
with
the
introduction
by
a
disembodied
head
in
a
crystal
ball
,
as
well
as
the
only
one
to
feature
comic-relief
characters
to
alleviate
the
grim
tone
.
It:O
was:O
the:O
only:O
entry:O
in:O
the:O
series:O
to:O
dispense:O
with:O
the:O
introduction:O
by:O
a:O
disembodied:O
head:O
in:O
a:O
crystal:O
ball:O
,:O
as:O
well:O
as:O
the:O
only:O
one:O
to:O
feature:O
comic-relief:O
characters:O
to:O
alleviate:O
the:O
grim:O
tone:O
.:O