Find the name and city of the airport which is the source for the most number of flight routes.
return airports ;return flight routes of #1 ;return number of  #2 for each #1 ;return #1 where #3 is highest ;return name of #4 ;return city of #4 ;return #5 ,  #6
['select', 'project', 'group', 'superlative', 'project', 'project', 'union']