CREATE TABLE "former_members" (
  "institution" text,
  "location" text,
  "founded" real,
  "type" text,
  "enrollment" real,
  "nickname" text,
  "joined" real,
  "left" real,
  "current_conference" text
);

Question: Where was the former private member that was founded in 1891 and left in 1975?
SQL: SELECT "location" FROM "former_members" WHERE "left"=1975 AND "type"='private' AND "founded"=1891;