If there is one open and one closed safety pin stuck through fabric.
return safety pin ;return fabric ;return #1 stuck through #2 ;return #3 that is open ;return #3 that is closed ;return the  number of  #4 ;return the  number of  #5 ;return if  #6 is equal to  one ;return if  #7 is equal to  one ;return if  both  #8 and #9 is true
['select', 'select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']