CREATE TABLE table_12840 ("Election" TEXT, "1st Member" TEXT, "1st Party" TEXT, "2nd Member" TEXT, "2nd Party" TEXT)

Which 2nd Member has a 1st Party of liberal?
SELECT "2nd Member" FROM table_12840 WHERE "1st Party" = 'liberal'
SELECT "2nd Member" FROM "table_12840" WHERE "1st Party" = 'liberal'