CREATE TABLE table_204_779 (id DECIMAL, "network name" TEXT, "flagship" TEXT, "programming type" TEXT, "owner" TEXT, "affiliates" DECIMAL)

what is the only network owned by national polytechnic institute ?
SELECT "network name" FROM table_204_779 WHERE "owner" = 'national polytechnic institute'
SELECT "network name" FROM "table_204_779" WHERE "owner" = 'national polytechnic institute'