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

Question: what's the district with incumbent being richard j. welch
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Richard J. Welch';

Question: what's the districtwith party being democratic
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "party"='Democratic';

Question: what's the district with candidates being harry lane englebright (r) unopposed
SQL: SELECT "district" FROM "united_states_house_of_representatives_e" WHERE "candidates"='Harry Lane Englebright (R) Unopposed';

Question:  how many candidates with district being california 7
SQL: SELECT COUNT("candidates") FROM "united_states_house_of_representatives_e" WHERE "district"='California 7';

Question: what's the party with incumbent being william e. evans
SQL: SELECT "party" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='William E. Evans';