How many foundation dates were there when the  television channels is canal nou canal nou dos canal nou 24 tvvi?
CREATE TABLE "table1_23143607_1" (
  "autonomous_community" text,
  "organization" text,
  "television_channels" text,
  "radio_stations" text,
  "foundation" real
);
SELECT COUNT("foundation") FROM "table1_23143607_1" WHERE "television_channels"='Canal Nou Canal Nou Dos Canal Nou 24 TVVi';