At the preaching of Jonah (eis to kērugma Iōna). Note this use of eis as in Mat 10:41; Mat 12:41. Luke inserts the words about the Queen of the South (Luk 11:31) in between the discussion of Jonah (Luk 11:29., Luk 11:32). Both Solomōnos (Luk 11:31) and Iōnā (Luk 11:32) are in the ablative case after the comparative pleion (more, something more).