How many years after the "Wobblies" was founded did the IWW organize a strike of more than twenty thousand textile workers?
return the  Wobblies was  founded ;return the  IWW did organize a strike of more than twenty thousand textile workers ;return year of #1 ;return year of #2 ;return difference of #3 and  #4
['select', 'select', 'project', 'project', 'arithmetic']