CREATE TABLE table_name_33 (seats_2006 INTEGER, parties_and_voter_communities VARCHAR, _percentage_2006 VARCHAR)
what is the total number of seats 2006 that has parties and voter turnout in % and whose %2006 is greater than 51.5?
SELECT SUM(seats_2006) FROM table_name_33 WHERE parties_and_voter_communities = "voter turnout in %" AND _percentage_2006 > 51.5