What are the names of all aircrafts that are associated with both London Heathrow and Gatwick airports?
return aircrafts ;return airports #1 are  associated with ;return #1 where #2 is  London Heathrow ;return #1 where #2 is  Gatwick ;return #1 of  both #3 and  #4 ;return names of  #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']