With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
deck
is
made
of
concrete
,
which
contributes
to
its
being
one
of
the
heaviest
bascule
bridges
in
the
United
States
.
The:O
deck:O
is:O
made:O
of:O
concrete:O
,:O
which:O
contributes:O
to:O
its:O
being:O
one:O
of:O
the:O
heaviest:O
bascule:O
bridges:O
in:O
the:O
United:location-GPE
States:location-GPE
.:O