Write SQL query to solve given problem: How many restaurants were inspected on 2015/5/8?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T2.license_no) FROM establishment AS T1 INNER JOIN inspection AS T2 ON T1.license_no = T2.license_no WHERE T2.inspection_date = '2015-05-08' AND T1.facility_type = 'Restaurant'