What is the average distance and price for all flights from LA?
return flights ;return #1 from  LA ;return the  distances for #2 ;return the  prices for #2 ;return the  average of  #3 ;return the  average of  #4 ;return #5 ,  #6
['select', 'filter', 'project', 'project', 'aggregate', 'aggregate', 'union']