Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_52 ( birth VARCHAR, became_duchess VARCHAR )

### Question ###
What is the Birth of the lady that has a Became Duchess on 18 august 1593 husband's accession?

### Accurate SQL ###

SELECT birth FROM table_name_52 WHERE became_duchess = "18 august 1593 husband's accession"