CREATE TABLE table_13914 ("Year ( s ) " TEXT, "Selection show" TEXT, "Venue" TEXT, "National final main host" TEXT, "National final co host" TEXT, "Semi final/heat host" TEXT)

What is the name of the national final main host when the semi final/heat host shows internal selection in 2011?
SELECT "National final main host" FROM table_13914 WHERE "Semi final/heat host" = 'internal selection' AND "Year(s)" = '2011'
SELECT "National final main host" FROM "table_13914" WHERE "Semi final/heat host" = 'internal selection' AND "Year(s)" = '2011'