Question: Can you provide me with a list of all of the loans that both Mary and Jack received?
SQL: select t2.loan_type from customer as t1 join loan as t2 on t1.cust_id  =  t2.cust_id where t1.cust_name  =  "Mary" intersect select t4.loan_type from customer as t3 join loan as t4 on t3.cust_id  =  t4.cust_id where t3.cust_name  =  "Jack"