Table: election_results_1886
Columns: district
incumbent
party
first_elected
result
candidates

Question: Who were all candidate when incumbent was D. Wyatt Aiken?
SQL: SELECT "candidates" FROM election_results_1886 WHERE "incumbent" = 'D. Wyatt Aiken'

Question: How many incumbents for the district of South Carolina 5?
SQL: SELECT COUNT("incumbent") FROM election_results_1886 WHERE "district" = 'South Carolina 5'

Question: Who was everyone first elected when incumbent was John J. Hemphill?
SQL: SELECT "first_elected" FROM election_results_1886 WHERE "incumbent" = 'John J. Hemphill'