Question: Who were all candidate when incumbent was D. Wyatt Aiken?
SQL: SELECT "Candidates" FROM "1-1431467-4" WHERE "Incumbent" = 'D. Wyatt Aiken';

Question: How many incumbents for the district of South Carolina 5?
SQL: SELECT COUNT("Incumbent") FROM "1-1431467-4" WHERE "District" = 'South Carolina 5';

Question: Who was everyone first elected when incumbent was John J. Hemphill?
SQL: SELECT "First elected" FROM "1-1431467-4" WHERE "Incumbent" = 'John J. Hemphill';