What was the u.s. viewers (millions) when the production code was 4alh19?
CREATE TABLE table_3632 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Director" text,
    "Writer(s)" text,
    "Original air date" text,
    "Production code" text,
    "U.S. viewers (million)" text
)
SELECT "U.S. viewers (million)" FROM table_3632 WHERE "Production code" = '4ALH19'
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 was the u.s. viewers (millions) when the production code was 4alh19? ### Input: CREATE TABLE table_3632 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Director" text,
    "Writer(s)" text,
    "Original air date" text,
    "Production code" text,
    "U.S. viewers (million)" text
) ### Response: SELECT "U.S. viewers (million)" FROM table_3632 WHERE "Production code" = '4ALH19'