How many more households had a female householder with no husband present compared to a  male householder with no wife present?
return households ;return #1 that had a female householder  with no husband present ;return #1 that had a male householder  with no wife present ;return number of  #2 ;return number of  #3 ;return difference of #4 and  #5
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']