Question: Which customer made the largest amount of claim in a single claim? Return the customer details.
SQL: SELECT t3.customer_details FROM claim_headers AS t1 JOIN policies AS t2 ON t1.policy_id  =  t2.policy_id JOIN customers AS t3 ON t2.customer_id  =  t3.customer_id WHERE t1.amount_claimed  =  (SELECT max(amount_claimed) FROM claim_headers)