If there is one purple pencil case and one hot pink pencil case.
return pencil case  ;return #1 that is purple ;return #1 that is hot pink ;return number of  #2 ;return number of  #3 ;return if  #4 is equal to  one ;return if  #5 is equal to  one ;return if  both  #6 and #7 are true
['select', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']