What County was built after 1920 with a Latitude of 37°40′30"n?
CREATE TABLE "references" (
  "county" text,
  "monument_name" text,
  "year_built" real,
  "city_or_town" text,
  "latitude" text,
  "longitude" text
);
SELECT "county" FROM "references" WHERE "year_built">1920 AND "latitude"='37°40′30\"n';