CREATE TABLE film (film_id DECIMAL, title TEXT, studio TEXT, director TEXT, gross_in_dollar DECIMAL)
CREATE TABLE film_market_estimation (estimation_id DECIMAL, low_estimate DECIMAL, high_estimate DECIMAL, film_id DECIMAL, type TEXT, market_id DECIMAL, year DECIMAL)
CREATE TABLE market (market_id DECIMAL, country TEXT, number_cities DECIMAL)

What are the titles of films that do not have a film market estimation?
SELECT title FROM film WHERE NOT film_id IN (SELECT film_id FROM film_market_estimation)
SELECT "title" FROM "film" WHERE NOT "film_id" IN (SELECT "film_id" FROM "film_market_estimation")