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_53876 ( "Interregnum began" text, "Interregnum ended" text, "Duration" text, "Count Palatine of Saxony" text, "Count Palatine of the Rhine" text )

### Question ###
What is the Interregnum ended for Count Palatine of Saxony of frederick augustus i, elector of saxony?

### Accurate SQL ###

SELECT "Interregnum ended" FROM table_53876 WHERE "Count Palatine of Saxony" = 'frederick augustus i, elector of saxony'