How many years after Matthias's succession as King of Hungary did he marry the Bohemian king George of Podebrady's daughter Catherine?
return Matthias 's  succession as king of Hungary ;return Matthias did marry the  Bohemian king George of Podebrady 's  daughter Catherine ;return year of #1 ;return year of #2 ;return difference of #3 and  #4
['select', 'select', 'project', 'project', 'arithmetic']