CREATE TABLE "north_carolina" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "status" text,
  "opponent" text
);

Question: To what district does Bill Hefner belong?
SQL: SELECT "district" FROM "north_carolina" WHERE "incumbent"='Bill Hefner';

Question: Who ran unsuccessfully against Bill Hefner?
SQL: SELECT "opponent" FROM "north_carolina" WHERE "incumbent"='Bill Hefner';

Question: How many districts are respresented by Alex McMillan?
SQL: SELECT COUNT("status") FROM "north_carolina" WHERE "incumbent"='Alex McMillan';