Which R 51 O value corresponds to a D 42 O value of r 19?
CREATE TABLE table_name_8 (
    r_51_o VARCHAR,
    d_42_o VARCHAR
)
SELECT r_51_o FROM table_name_8 WHERE d_42_o = "r 19"
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: Which R 51 O value corresponds to a D 42 O value of r 19? ### Input: CREATE TABLE table_name_8 (
    r_51_o VARCHAR,
    d_42_o VARCHAR
) ### Response: SELECT r_51_o FROM table_name_8 WHERE d_42_o = "r 19"