CREATE TABLE table_31350 ("Country" TEXT, "Alternante title" TEXT, "TV Network ( s ) " TEXT, "Series premiere" TEXT, "Series finale" TEXT)

What was the date of the series premiere whose TV network was TV3?
SELECT "Series premiere" FROM table_31350 WHERE "TV Network(s)" = 'TV3'
SELECT "Series premiere" FROM "table_31350" WHERE "TV Network(s)" = 'TV3'