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

Question: Omar Burleson was the incumbent in what district? 
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Omar Burleson';

Question: In what district was incumbent first elected in 1938? 
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "first_elected"=1938;