If there are two empty cafes with no more than one person in the whole image.
return cafes ;return #1 that are empty ;return the  number of  #2 ;return if  #3 is equal to  two ;return person ;return the  number of  #5 ;return if  #6 is at most one ;return if  both  #4 and #7 is true
['select', 'filter', 'aggregate', 'boolean', 'select', 'aggregate', 'boolean', 'boolean']