What are the names of the artists who sang the shortest song?
SELECT T1.artist_name FROM song AS T1 JOIN files AS T2 ON T1.f_id  =  T2.f_id ORDER BY T2.duration LIMIT 1
SELECT T1.artist_name FROM song AS T1 JOIN files AS T2 ON T1.f_id  =  T2.f_id ORDER BY T2.duration LIMIT 1
[{'artist_name': 'Prity'}]