With no explanation, label each line with "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
During
the
Second
World
War
a
steel
swing
bridge
was
built
in
1942
but
this
was
damaged
by
a
steamship
and
removed
in
1947
.
During:O
the:O
Second:event-attack/battle/war/militaryconflict
World:event-attack/battle/war/militaryconflict
War:event-attack/battle/war/militaryconflict
a:O
steel:O
swing:O
bridge:O
was:O
built:O
in:O
1942:O
but:O
this:O
was:O
damaged:O
by:O
a:O
steamship:O
and:O
removed:O
in:O
1947:O
.:O