CREATE TABLE "united_states_house_of_representatives_e" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);

Question: Who were the candidates when Henry Garland Dupré was incumbent?
SQL: SELECT "candidates" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Henry Garland Dupré';

Question: How many candidates were there when Henry Garland Dupré was the incumbent? 
SQL: SELECT COUNT("candidates") FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Henry Garland Dupré';

Question: What district did James O'Connor belong to?
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='James O''Connor';