What Occupation has the Rank of 5th and has a Candidate's Name of Henry Zekveld?
CREATE TABLE "4_seats" (
  "riding" text,
  "candidate_s_name" text,
  "gender" text,
  "residence" text,
  "occupation" text,
  "votes" real,
  "rank" text
);
SELECT "occupation" FROM "4_seats" WHERE "rank"='5th' AND "candidate_s_name"='henry zekveld';