Question: List down the World Bank code of the countries whose country note has described "Data source : Human Mortality Database by University of California, Berkeley, and Max Planck Institute for Demographic Research."? Please include their lending category.
SQL: SELECT DISTINCT T1.Wb2code, T1.LendingCategory FROM Country AS T1 INNER JOIN CountryNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T2.Description = 'Data source : Human Mortality Database by University of California, Berkeley, and Max Planck Institute for Demographic Research.' AND T1.LendingCategory != ''