What is the D 42 when the D 50 is d 31?
CREATE TABLE table_56228 (
    "D 50" text,
    "D 49" text,
    "D 48" text,
    "D 47" text,
    "D 46" text,
    "D 45" text,
    "D 44" text,
    "D 43" text,
    "D 42" text,
    "D 41" text
)
SELECT "D 42" FROM table_56228 WHERE "D 50" = 'd 31'
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: What is the D 42 when the D 50 is d 31? ### Input: CREATE TABLE table_56228 (
    "D 50" text,
    "D 49" text,
    "D 48" text,
    "D 47" text,
    "D 46" text,
    "D 45" text,
    "D 44" text,
    "D 43" text,
    "D 42" text,
    "D 41" text
) ### Response: SELECT "D 42" FROM table_56228 WHERE "D 50" = 'd 31'