What RIAA Sales Certification was awarded to the song that had a Billboard 200 Peak of 21?
CREATE TABLE table_name_1 (riaa_sales_certification VARCHAR, billboard_200_peak VARCHAR)
SELECT riaa_sales_certification FROM table_name_1 WHERE billboard_200_peak = 21
### Context: CREATE TABLE table_name_1 (riaa_sales_certification VARCHAR, billboard_200_peak VARCHAR) ### Question: What RIAA Sales Certification was awarded to the song that had a Billboard 200 Peak of 21? ### Answer: SELECT riaa_sales_certification FROM table_name_1 WHERE billboard_200_peak = 21