If one of the machines sitting amongst the others is blue.
return machines ;return #1 that are blue ;return number of  #1 ;return number of  #2 ;return if  #3 is higher than two ;return if  #4 is equal to  one ;return if  both  #6 and #5 are true
['select', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']