With no explanation, label each line with "art-writtenart", "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "building-airport" or "building-hospital" preceded by ":".
The
principal
work
on
NATO
Enlargement
was
presented
in
a
Foreign
Affairs
article
(
``
Building
a
New
NATO
)
and
two
Survival
articles
(
Strategic
Options
and
Budget
Costs
for
NATO
Enlargement
)
.
The:O
principal:O
work:O
on:O
NATO:event-other
Enlargement:event-other
was:O
presented:O
in:O
a:O
Foreign:art-writtenart
Affairs:art-writtenart
article:O
(:O
``:O
Building:art-writtenart
a:art-writtenart
New:art-writtenart
NATO:art-writtenart
):O
and:O
two:O
Survival:art-writtenart
articles:O
(:O
Strategic:art-writtenart
Options:art-writtenart
and:art-writtenart
Budget:art-writtenart
Costs:art-writtenart
for:art-writtenart
NATO:art-writtenart
Enlargement:art-writtenart
):O
.:O