If the left and right image contains a total of four llamas.
return left image ;return right image ;return llamas of #1 ;return llamas of #2 ;return the  number of  #3 ;return the  number of  #4 ;return the  sum of #5 and #6 ;return if  #7 is equal to  four
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic', 'boolean']