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

Question: What district first elected in 1978?
SQL: SELECT "district" FROM "wisconsin" WHERE "first_elected"=1978;

Question: What district was incumbent Jerry Kleczka in?
SQL: SELECT "district" FROM "wisconsin" WHERE "incumbent"='Jerry Kleczka';

Question: How many districts had results related to incumbent Toby Roth?
SQL: SELECT COUNT("result") FROM "wisconsin" WHERE "incumbent"='Toby Roth';

Question: Who were the candidates in district Wisconsin 1?
SQL: SELECT "candidates" FROM "wisconsin" WHERE "district"='Wisconsin 1';