With no explanation, label each line with "product-other", "location-GPE", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Sprint
PCS
later
selected
CDMA
as
the
radio
interface
for
its
nationwide
network
and
built
out
a
parallel
CDMA
network
in
the
Baltimore-Washington
area
,
launching
service
in
1997
.
Sprint:organization-company
PCS:organization-company
later:O
selected:O
CDMA:product-other
as:O
the:O
radio:O
interface:O
for:O
its:O
nationwide:O
network:O
and:O
built:O
out:O
a:O
parallel:O
CDMA:product-other
network:O
in:O
the:O
Baltimore-Washington:location-GPE
area:O
,:O
launching:O
service:O
in:O
1997:O
.:O