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 ":".
The
bridge
is
often
said
to
have
been
the
longest
in
the
world
at
when
it
was
completed
in
1634
.
The:O
bridge:O
is:O
often:O
said:O
to:O
have:O
been:O
the:O
longest:O
in:O
the:O
world:O
at:O
when:O
it:O
was:O
completed:O
in:O
1634:O
.:O