How many years after Maria Antonia married Maximillian Emanuel did the Treaty make their six year old son heir to the bulk of the Spanish Monarchy?
return Maria Antonia married Maximillian Emanuel ;return the  Treaty make their six year old son heir to the   bulk of the Spanish Monarchy ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']