How many years was it between when the Tready of Edinburgh-Northampton was signed and when Edward II of England was deposed?
return the  Tready of Edinburgh-Northampton was  signed ;return Edward II of England was  deposed ;return year of #1 ;return year of #2 ;return difference of #3 and  #4
['select', 'select', 'project', 'project', 'arithmetic']