How many years after they first started the war past up to when Henry Killigrew worked on the reconciliation of the Scottish nobility at Perth?
return they first started the  war ;return Henry Killigrew worked on the  reconciliation of the   Scottish nobility at Perth ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']