How many years after Duke Albert's death did a fight flare up because his younger brother Henry did not agree with the ruling made by Elector Wenceslas appointing Bernard, Albert's brother-in-law, as co-regent?
return the  death of Duke Albert  ;return a fight flares up because his younger brother Henry did not  agree with the  ruling made by Elector Wenceslas appointing Bernard ,  Albert  's  brother-in-law ,   as co-regent ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']