What counties represented have a First Elected of 2006 and a Ways and Means Committee?
CREATE TABLE "members" (
  "district" text,
  "counties_represented" text,
  "delegate" text,
  "party" text,
  "first_elected" real,
  "committee" text
);
SELECT "counties_represented" FROM "members" WHERE "first_elected"=2006 AND "committee"='ways and means';