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
offered
several
online
video
games
at
a
flat
monthly
fee
of
$
10
per
month
,
a
relatively
radical
payment
system
in
the
age
of
pay-by-hour
online
gaming
.
It:O
offered:O
several:O
online:O
video:O
games:O
at:O
a:O
flat:O
monthly:O
fee:O
of:O
$:O
10:O
per:O
month:O
,:O
a:O
relatively:O
radical:O
payment:O
system:O
in:O
the:O
age:O
of:O
pay-by-hour:O
online:O
gaming:O
.:O