How many more travelers in Bangkok were Thai rather than foreign in 2010?
return Bangkok ;return travelers of #1 ;return #2 in  2010 ;return #3 that were Thai ;return #3 that were foreign ;return number of  #4 ;return number of  #5 ;return the  difference of #6 and  #7
['select', 'project', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']