With no explanation, label each line with "organization-media/newspaper", "location-GPE", "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
He
served
as
the
sportscaster
for
Chicago
's
WLS-TV
(
an
ABC
-affiliate
)
.
He:O
served:O
as:O
the:O
sportscaster:O
for:O
Chicago:location-GPE
's:O
WLS-TV:organization-media/newspaper
(:O
an:O
ABC:organization-company
-affiliate:O
):O
.:O