what is the total number of seats 2006 that has parties and voter turnout in % and whose %2006 is greater than 51.5?
CREATE TABLE "community_council" (
  "parties_and_voter_communities" text,
  "pct_2006" real,
  "seats_2006" real,
  "pct_2001" real,
  "seats_2001" real
);
SELECT SUM("seats_2006") FROM "community_council" WHERE "parties_and_voter_communities"='voter turnout in %' AND "pct_2006">51.5;