What are the names of all employees who can fly both the Boeing 737-800 and the Airbus A340-300?
return employees ;return #1 who  can fly the  Boeing 737-800 ;return #1 who  can fly the  Airbus A340-300 ;return #1 in both #2 and  #3 ;return names of  #4
['select', 'filter', 'filter', 'intersection', 'project']