Show me the title of all films that have market estimation.
select distinct t1.title from film as t1 join film_market_estimation as t2 on t1.film_id = t2.film_id
What are their high market estimations?
select t1.title, t2.high_estimate from film as t1 join film_market_estimation as t2 on t1.film_id = t2.film_id
Show me the film that is the highest of them.
select t1.title from film as t1 join film_market_estimation as t2 on t1.film_id = t2.film_id order by high_estimate desc limit 1