With no explanation, label each line with "art-broadcastprogram", "O", "art-other", "art-film", "art-music", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
vitriol
spewed
forth
on
the
forums
has
become
so
well-documented
that
the
``
X-Play
``
staff
even
produced
a
music
video
dedicated
to
the
message
board
's
denizens
entitled
``
On
the
X-Play
Boards
``
(
MP3
format
)
.
The:O
vitriol:O
spewed:O
forth:O
on:O
the:O
forums:O
has:O
become:O
so:O
well-documented:O
that:O
the:O
``:O
X-Play:art-broadcastprogram
``:O
staff:O
even:O
produced:O
a:O
music:O
video:O
dedicated:O
to:O
the:O
message:O
board:O
's:O
denizens:O
entitled:O
``:O
On:art-other
the:art-other
X-Play:art-other
Boards:art-other
``:O
(:O
MP3:O
format:O
):O
.:O