With no explanation, label each line with "building-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
course
for
the
mass
participation
race
,
which
has
attracted
almost
30,000
runners
in
previous
years
,
remained
unchanged
and
begins
by
crossing
the
Ponte
25
de
Abril
suspension
bridge
before
linking
up
with
the
new
elite
course
.
The:O
course:O
for:O
the:O
mass:O
participation:O
race:O
,:O
which:O
has:O
attracted:O
almost:O
30,000:O
runners:O
in:O
previous:O
years:O
,:O
remained:O
unchanged:O
and:O
begins:O
by:O
crossing:O
the:O
Ponte:building-other
25:building-other
de:building-other
Abril:building-other
suspension:O
bridge:O
before:O
linking:O
up:O
with:O
the:O
new:O
elite:O
course:O
.:O