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 Drama_Workshop_Groups (Marketing_Region_Code VARCHAR)
### Question:
What is the marketing region code that has the most drama workshop groups?
### Answer:
SELECT Marketing_Region_Code FROM Drama_Workshop_Groups GROUP BY Marketing_Region_Code ORDER BY COUNT(*) DESC LIMIT 1