With no explanation, label each line with "O", "organization-other", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
To
address
the
demand
for
a
better
way
to
cook
food
for
millions
in
refugee
camps
,
engineer
Damon
Ogle
and
carpenter
Fred
Colgan
,
working
with
Aprovecho
Research
Center
,
developed
a
highly
efficient
solid-fuel
cookstove
for
use
in
institutional
settings
in
2008
.
To:O
address:O
the:O
demand:O
for:O
a:O
better:O
way:O
to:O
cook:O
food:O
for:O
millions:O
in:O
refugee:O
camps:O
,:O
engineer:O
Damon:person-other
Ogle:person-other
and:O
carpenter:O
Fred:person-other
Colgan:person-other
,:O
working:O
with:O
Aprovecho:organization-other
Research:organization-other
Center:organization-other
,:O
developed:O
a:O
highly:O
efficient:O
solid-fuel:O
cookstove:O
for:O
use:O
in:O
institutional:O
settings:O
in:O
2008:O
.:O