user: Question: Who was the succesor that was formally installed on November 8, 1978?
Columns: ['State (class)', 'Vacator', 'Reason for change', 'Successor', 'Date of successors formal installation']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Arkansas (2)', 'John L. McClellan (D)', 'Died November 28, 1977', 'Kaneaster Hodges, Jr. (D)', 'December 10, 1977']
SQL:

assistant: SELECT "Successor" FROM "Table" WHERE "Date of successors formal installation" = 'November 8, 1978';