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 ":".
Two
divisions
were
sent
south
,
to
cross
the
canal
at
a
weaker
point
,
while
Canadian
combat
engineers
worked
to
construct
the
wooden
bridges
for
the
assault
.
Two:O
divisions:O
were:O
sent:O
south:O
,:O
to:O
cross:O
the:O
canal:O
at:O
a:O
weaker:O
point:O
,:O
while:O
Canadian:location-GPE
combat:O
engineers:O
worked:O
to:O
construct:O
the:O
wooden:O
bridges:O
for:O
the:O
assault:O
.:O