With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
bomb
was
located
on
the
south
side
of
the
bridge
and
contained
30
lb
of
Semtex
high
explosives
,
which
according
to
an
explosives
expert
had
the
ability
to
blow
up
the
entire
bridge
.
The:O
bomb:O
was:O
located:O
on:O
the:O
south:O
side:O
of:O
the:O
bridge:O
and:O
contained:O
30:O
lb:O
of:O
Semtex:product-weapon
high:O
explosives:O
,:O
which:O
according:O
to:O
an:O
explosives:O
expert:O
had:O
the:O
ability:O
to:O
blow:O
up:O
the:O
entire:O
bridge:O
.:O