CREATE TABLE table_23726 ("Date" CLOB, "Presenter" CLOB, "Guest 1" CLOB, "Guest 2" CLOB, "Guest 3" CLOB, "Guest 4" CLOB)

Who is the guest 1 in the episode where guest 4 is Jill Douglas?
SELECT "Guest 1" FROM table_23726 WHERE "Guest 4" = 'Jill Douglas'
SELECT "Guest 1" FROM "table_23726" WHERE "Guest 4" = 'Jill Douglas'