Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE film_market_estimation ( estimation_id number, low_estimate number, high_estimate number, film_id number, type text, market_id number, year number )
TABLE: CREATE TABLE market ( market_id number, country text, number_cities number )
TABLE: CREATE TABLE film ( film_id number, title text, studio text, director text, gross_in_dollar number )

### Question ###
Return the title of the film with the highest high estimate?

### Accurate SQL ###

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