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 ":".
Its
success
was
a
major
milestone
and
marked
Canada
's
entry
into
the
global
nuclear
power
scene
.
Its:O
success:O
was:O
a:O
major:O
milestone:O
and:O
marked:O
Canada:location-GPE
's:O
entry:O
into:O
the:O
global:O
nuclear:O
power:O
scene:O
.:O