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

Question: What district is incumbent albert rains from?
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Albert Rains';

Question: How many candidates represent the district of kenneth a. roberts?
SQL: SELECT COUNT("candidates") FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Kenneth A. Roberts';