Table: election_results_1966
Columns: district
incumbent
party
first_elected
result
candidates

Question: What's the year of the first election of the district whose incumbent is Edwin E. Willis?
SQL: SELECT "first_elected" FROM election_results_1966 WHERE "incumbent" = 'Edwin E. Willis'

Question: What district is F. Edward Hebert the incumbent in?
SQL: SELECT "district" FROM election_results_1966 WHERE "incumbent" = 'F. Edward Hebert'

Question: Who were the candidates in the district whose incumbent is Joe Waggonner?
SQL: SELECT "candidates" FROM election_results_1966 WHERE "incumbent" = 'Joe Waggonner'

Question: What's the district that Otto Passman is the incumbent of?
SQL: SELECT "district" FROM election_results_1966 WHERE "incumbent" = 'Otto Passman'