What does luke 11 29-32 gospel mean?

Jesus here was rebuking the people for demanding a sign from heaven. He says that no sign will be given them except "the sign of Jonah." Jonah served as a sign both by his three days in the fish and by his bold preaching, which moved the Ninevites to repent. Jesus spent three days in the ground before his resurrection. Jesus boldly preached about the kingdom and many repented. Jesus says: "But look! something more than Jonah is here." Jesus is also more than Solomon, whose wisdom the queen of Sheba came to hear. Jesus' wisdom was far surpassing that of anyone else, even the wisest of all humans that ever lived.