Question: What's the year of the first election of the district whose incumbent is Edwin E. Willis?
SQL: SELECT "First elected" FROM "1-1341843-19" WHERE "Incumbent" = 'Edwin E. Willis';

Question: What district is F. Edward Hebert the incumbent in?
SQL: SELECT "District" FROM "1-1341843-19" WHERE "Incumbent" = 'F. Edward Hebert';

Question: Who were the candidates in the district whose incumbent is Joe Waggonner?
SQL: SELECT "Candidates" FROM "1-1341843-19" WHERE "Incumbent" = 'Joe Waggonner';

Question: What's the district that Otto Passman is the incumbent of?
SQL: SELECT "District" FROM "1-1341843-19" WHERE "Incumbent" = 'Otto Passman';