What is the review of the restaurant at 8440 Murray Ave?
8440 Murray Ave refers to street_num = 8440 and street_name = 'murray ave'
SELECT T2.review FROM location AS T1 INNER JOIN generalinfo AS T2 ON T1.id_restaurant = T2.id_restaurant WHERE T1.street_name = 'murray ave' AND T1.street_num = 8440