What is First Member, when Election is "1871 by-election"?
CREATE TABLE "m_ps_1832_1885" (
  "election" text,
  "first_member" text,
  "1st_party" text,
  "second_member" text,
  "2nd_party" text
);
SELECT "first_member" FROM "m_ps_1832_1885" WHERE "election"='1871 by-election';