Which State (class) has a Successor of harry f. byrd, jr. (d)? Question
CREATE TABLE "senate" (
  "state_class" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_of_successor_s_formal_installation" text
);
SELECT "state_class" FROM "senate" WHERE "successor"='harry f. byrd, jr. (d)';