what is the virtual callsign if is wnet
CREATE TABLE "table1_1979203_1" (
  "virtual" text,
  "callsign" text,
  "affiliation" text,
  "branding" text,
  "channel" text,
  "programming" text,
  "owner" text
);
SELECT "virtual" FROM "table1_1979203_1" WHERE "callsign"='WNET';