CREATE TABLE body_builder (body_builder_id DECIMAL, people_id DECIMAL, snatch DECIMAL, clean_jerk DECIMAL, total DECIMAL)
CREATE TABLE people (people_id DECIMAL, name TEXT, height DECIMAL, weight DECIMAL, birth_date TEXT, birth_place TEXT)

What are the birth places that are shared by at least two people?
SELECT birth_place FROM people GROUP BY birth_place HAVING COUNT(*) >= 2
SELECT "birth_place" FROM "people" GROUP BY "birth_place" HAVING COUNT(*) >= 2