What about Mrs. Hanna Willms ? | Did  you  mean the number of policies Mrs. Hanna Willms has listed? | Yes
SELECT count ( * )  FROM customers AS t1 JOIN customers_policies AS t2 ON t1.customer_id  =  t2.customer_id where Customer_name = "Mrs. Hanna Willms"
the number of policies Mrs. Hanna Willms has is calculated by COUNT(*) with a JOIN between customers and customers_policies tables where the Customer_name is 'Mrs. Hanna Willms';