If one of the sinks is inset in a rectangle above metal legs.
return sink ;return rectangle ;return #1 inset in  #2 ;return legs ;return #4 that are metal ;return #3 above #5 ;return the  number of  #6 ;return if  #7 is equal to  one
['select', 'select', 'filter', 'select', 'filter', 'filter', 'aggregate', 'boolean']