What's the network of BBTV Channel 7?
CREATE TABLE "analogue_terrestrial_television" (
  "name" text,
  "network" text,
  "owner" text,
  "launch_date" text,
  "channel_bkk" text,
  "broadcasting_area" text,
  "transmitted_area" text,
  "broadcasting_hours" text
);
SELECT "network" FROM "analogue_terrestrial_television" WHERE "name"='bbtv channel 7';