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 ":".
Regional
trains
are
usually
all
seated
and
provide
luggage
space
,
although
they
seldom
have
all
the
amenities
of
inter-city
trains
such
as
a
buffet
or
dining
car
.
Regional:O
trains:O
are:O
usually:O
all:O
seated:O
and:O
provide:O
luggage:O
space:O
,:O
although:O
they:O
seldom:O
have:O
all:O
the:O
amenities:O
of:O
inter-city:O
trains:O
such:O
as:O
a:O
buffet:O
or:O
dining:O
car:O
.:O