SELECT T2.name ,  T2.location FROM race AS T1 JOIN track AS T2 ON T1.track_id  =  T2.track_id GROUP BY T1.track_id HAVING count(*)  =  1
Show the name and location of track with 1 race.
[Schema (values) (types)]: | race_track |  race : race_id (text) , name (number) , class (text) , date (text) , track_id (text) | track : track_id (text) , name (number) , location (text) , seating (text) , year_opened (text);