If there are two sinks with faucets and bowls.
return sinks ;return faucets ;return bowls ;return #1 with #2 ;return #1 with #3 ;return #1 in  both  #4 and #5 ;return number of  #6 ;return if  #7 is equal to  two
['select', 'select', 'select', 'filter', 'filter', 'intersection', 'aggregate', 'boolean']