Question: Name the date successor seated for successor being Vacant
SQL: SELECT "Date successor seated" FROM "1-2417330-4" WHERE "Successor" = 'Vacant';

Question: Name the vacator for Kentucky 2nd
SQL: SELECT "Vacator" FROM "1-2417330-4" WHERE "District" = 'Kentucky 2nd';

Question: Name the successor for Election was successfully contested July 30, 1861
SQL: SELECT "Successor" FROM "1-2417330-4" WHERE "Reason for change" = 'Election was successfully contested July 30, 1861';

Question: Name the successor for Vacant and December 3, 1862
SQL: SELECT "Successor" FROM "1-2417330-4" WHERE "Reason for change" = 'Vacant' AND "Date successor seated" = 'December 3, 1862';