user: Question: Who did Walter B. Jones, Sr. (D) succeeded in office?
Columns: ['District', 'Vacator', 'Reason for change', 'Successor', 'Date successor seated']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Louisiana 7th', 'T. Ashton Thompson (D)', 'Died July 1, 1965', 'Edwin Edwards (D)', 'October 2, 1965']
SQL:

assistant: SELECT "Vacator" FROM "Table" WHERE "Successor" = 'Walter B. Jones, Sr. (D)';