How many months after Powderville, Montana became the first establishment in the county, did Mizpah Creek incidents begin near the Powderville telegraph station?
return Powderville  Montana became the  first establishment in  the   county ;return Mizpah Creek incidents did begin near the  Powderville  telegraph station ;return when  was  #1 ;return when  was  #2 ;return difference of #3 and  #4 in  months
['select', 'select', 'project', 'project', 'arithmetic']