When did eleonor magdalene of the palatinate-neuburg become duchess?
CREATE TABLE table_name_77 (
    became_duchess VARCHAR,
    name VARCHAR
)
SELECT became_duchess FROM table_name_77 WHERE name = "eleonor magdalene of the palatinate-neuburg"
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: When did eleonor magdalene of the palatinate-neuburg become duchess? ### Input: CREATE TABLE table_name_77 (
    became_duchess VARCHAR,
    name VARCHAR
) ### Response: SELECT became_duchess FROM table_name_77 WHERE name = "eleonor magdalene of the palatinate-neuburg"