Between 1890 and 1914, how many hours did the average work week fall to for unionized manufacturing employees in the US?
return the  US ;return unionized manufacturing employees of #1 ;return hours in  the  average work week of #2 ;return #3 in  1890 ;return #3 in  1914 ;return the  difference of #4 and  #5
['select', 'project', 'project', 'filter', 'filter', 'arithmetic']