With no explanation, label each line with "O", "product-weapon", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
only
major
work
was
a
change
in
her
Electronic
Warfare
(
EW
)
configuration
.
The:O
only:O
major:O
work:O
was:O
a:O
change:O
in:O
her:O
Electronic:product-weapon
Warfare:product-weapon
(:O
EW:product-weapon
):O
configuration:O
.:O