If there are two pizza with all of it's slices and one is on a metal tray.
return pizzas ;return slices of #1 ;return #1 with all of #2 ;return tray ;return #4 that is metal ;return #3 on #5 ;return number of  #3 ;return number of  #6 ;return if  #7 is equal to  two ;return if  #8 is equal to  one ;return if  both  #9 and #10 are true
['select', 'project', 'filter', 'select', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']