Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_12 (birth VARCHAR, marriage VARCHAR)
### Question:
When was the duchess, who was married on 11 july 1643, born?
### Answer:
SELECT birth FROM table_name_12 WHERE marriage = "11 july 1643"