CREATE TABLE table_71751 ("Election" TEXT, "1st Member" TEXT, "1st Party" TEXT, "2nd Member" TEXT, "2nd Party" TEXT)

Which 1st Party has a 2nd Member of constituency abolished?
SELECT "1st Party" FROM table_71751 WHERE "2nd Member" = 'constituency abolished'
SELECT "1st Party" FROM "table_71751" WHERE "2nd Member" = 'constituency abolished'