What is the enrollment for the institution that is located in Lebanon, Tennessee (20,235)?
CREATE TABLE "full_members" (
  "institution" text,
  "location_population" text,
  "founded" real,
  "type" text,
  "enrollment" real,
  "nickname_colors" text,
  "football" text
);
SELECT "enrollment" FROM "full_members" WHERE "location_population"='Lebanon, Tennessee (20,235)';