How many films released between 1/2/1990 and 12/30/2000 starred Uma Thurman?
released between 1/2/1990 and 12/30/2000 refers to release_date BETWEEN '1990-01-02' AND '2000-12-30'; film has the same meaning as movie; starred Uma Thurman refers to person_name = 'Uma Thurman'
SELECT COUNT(T1.movie_id) FROM movie AS T1 INNER JOIN movie_cast AS T2 ON T1.movie_id = T2.movie_id INNER JOIN person AS T3 ON T2.person_id = T3.person_id WHERE T3.person_name = 'Uma Thurman' AND T1.release_date BETWEEN '1990-01-01' AND '2000-12-31'