who directed the episode written by Shonda Rhimes?
CREATE TABLE table_23492454_1 (
    directed_by VARCHAR,
    written_by VARCHAR
)
SELECT directed_by FROM table_23492454_1 WHERE written_by = "Shonda Rhimes"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: who directed the episode written by Shonda Rhimes? ### Input: CREATE TABLE table_23492454_1 (
    directed_by VARCHAR,
    written_by VARCHAR
) ### Response: SELECT directed_by FROM table_23492454_1 WHERE written_by = "Shonda Rhimes"