Find the name and country of origin for all artists who have release at least one song of resolution above 900.
SELECT T1.artist_name ,  T1.country FROM artist AS T1 JOIN song AS T2 ON T1.artist_name  =  T2.artist_name WHERE T2.resolution  >  900 GROUP BY T2.artist_name HAVING count(*)  >=  1
artists who have released at least one song refers to HAVING COUNT(*) >= 1; song of resolution above 900 refers to T2.resolution > 900; name and country of origin for all artists refers to T1.artist_name, T1.country;