What is the total number of First Elected that has counties represented of Anne Arundel, District of 30, and a Ways and Means Committee?
CREATE TABLE "members" (
  "district" text,
  "counties_represented" text,
  "delegate" text,
  "party" text,
  "first_elected" real,
  "committee" text
);
SELECT COUNT("first_elected") FROM "members" WHERE "counties_represented"='anne arundel' AND "district"='30' AND "committee"='ways and means';