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

Question: Who are all the candidates when Sam Rayburn was incumbent?
SQL: SELECT "candidates" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Sam Rayburn';

Question: What was the party that was frist elected in 1919?
SQL: SELECT "party" FROM "united_states_house_of_representatives_e" WHERE "first_elected"=1919;