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

Question: Who's the incumbent of Indiana 4 district?
SQL: SELECT "incumbent" FROM "united_states_house_of_representatives_e" WHERE "district"='Indiana 4';

Question: Who's the incumbent of the district with first election held in 1950?
SQL: SELECT "incumbent" FROM "united_states_house_of_representatives_e" WHERE "first_elected"='1950';