Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### 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