What are the names and locations of tracks that have had exactly 1 race?
return tracks ;return races of  #1 ;return number of  #2 for each  #1 ;return #1 where #3 is  1 ;return names of  #4 ;return locations of  #4 ;return #5 ,  #6
['select', 'project', 'group', 'comparative', 'project', 'project', 'union']