How many years after Alexander the Great invaded Pauravas and defeated King Prous was the area fuled by the Maurya Empire?
return Alexander the  Great invaded Pauravas and  defeated King Prous ;return the  area was  fuled by the   Maurya Empire ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']