CREATE TABLE song (artist_name VARCHAR, rating VARCHAR)
CREATE TABLE artist (artist_name VARCHAR, country VARCHAR)

What are the names and countries of origin for the artists who produced the top three highly rated songs.
SELECT T1.artist_name, T1.country FROM artist AS T1 JOIN song AS T2 ON T1.artist_name = T2.artist_name ORDER BY T2.rating DESC LIMIT 3
SELECT "T1"."artist_name", "T1"."country" FROM "artist" AS "T1" JOIN "song" AS "T2" ON "T1"."artist_name" = "T2"."artist_name" ORDER BY "T2"."rating" DESC NULLS LAST LIMIT 3