How many years after the conquest of the Balearics was the Pisan Liber maiolichinus completed?
return the  conquest of the   Balearics ;return the  Pisan Liber maiolichinus was  completed ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']