user: Question: How many successors are from the Georgia 2nd district?
Columns: ['District', 'Vacator', 'Reason for change', 'Successor', 'Date successor seated']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Illinois 6th', 'Vacant', 'Vacancy in term', 'John A. McClernand ( D )', 'Seated November 8, 1859']
SQL:

assistant: SELECT COUNT("Successor") FROM "Table" WHERE "District" = 'Georgia 2nd';