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

Question:  how many party with district being washington 7
SQL: SELECT COUNT("party") FROM "washington" WHERE "district"='Washington 7';

Question: what's the latest first elected year
SQL: SELECT MAX("first_elected") FROM "washington";

Question: what's the result with district being washington 7
SQL: SELECT "result" FROM "washington" WHERE "district"='Washington 7';

Question: what being the minimum first elected with district being washington 7
SQL: SELECT MIN("first_elected") FROM "washington" WHERE "district"='Washington 7';