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 ":".
Two
are
located
to
the
outside
of
the
bridge
's
roadways
,
while
two
are
in
the
median
of
the
roadways
.
Two:O
are:O
located:O
to:O
the:O
outside:O
of:O
the:O
bridge:O
's:O
roadways:O
,:O
while:O
two:O
are:O
in:O
the:O
median:O
of:O
the:O
roadways:O
.:O