original_column_name,column_name,column_description,data_format,value_description
card_id,credit card id,id number of credit card,integer,
disp_id,disposition id,disposition id,integer,
type,,type of credit card,text,"""junior"": junior class of credit card; 
""classic"": standard class of credit card; 
""gold"": high-level credit card"
issued,,the date when the credit card issued ,date,in the form YYMMDD