Return the total revenue of companies with headquarters in Tokyo or Taiwan.
return companies ;return headquarters of #1 ;return #1 where #2 is equal to Tokyo ;return #1 where #2 is equal to Taiwan ;return #3 ,  #4 ;return revenues of #5 ;return sum of #6
['select', 'project', 'comparative', 'comparative', 'union', 'project', 'aggregate']