If one of the knee braces has a small hole at the knee cap in an otherwise solid brace.
return knee  braces ;return knee  cap of #1 ;return hole at #2 ;return #3 that is small ;return #1 that has #4 ;return #5 that is solid ;return number of  #6 ;return if  #7 is equal to  one
['select', 'project', 'project', 'filter', 'filter', 'filter', 'aggregate', 'boolean']