CREATE TABLE table_13912 ("Year ( s ) " CLOB, "Selection show" CLOB, "Venue" CLOB, "National final main host" CLOB, "National final co host" CLOB, "Semi final/heat host" CLOB)

What was the venue when David Jacobs was the host?
SELECT "Venue" FROM table_13912 WHERE "Semi final/heat host" = 'david jacobs'
SELECT "Venue" FROM "table_13912" WHERE "Semi final/heat host" = 'david jacobs'