How many rentals did Ella Oliver hire in June 2016?
'Ella Oliver' is a full name of a customer; full name refers to first_name, last_name; rental hired in June 2016 refers to rental_date BETWEEN '2005-06-01' AND '2005-06-30'
SELECT COUNT(T1.rental_id) FROM rental AS T1 INNER JOIN customer AS T2 ON T1.customer_id = T2.customer_id WHERE T2.first_name = 'ELLA' AND T2.last_name = 'ELLA' AND date(T1.rental_date) BETWEEN '2005-06-01' AND '2005-06-30'