SELECT "1st Member" FROM table_12823 WHERE "1st Party" = 'constituency abolished'
What is 1st Member, when 1st Party is 'Constituency Abolished'?
CREATE TABLE table_12823 (
    "Election" text,
    "1st Member" text,
    "1st Party" text,
    "2nd Member" text,
    "2nd Party" text
)