What are the headquarters that have both a company in the banking and 'oil and gas' industries?
return headquarters ;return companies in #1 ;return industries of  #2 ;return #1 where #3 is  banking ;return #1 where #3 is  'oil and  gas ;return #1 of  both #4 and  #5
['select', 'project', 'project', 'comparative', 'comparative', 'intersection']