original_column_name,column_name,column_description,data_format,value_description
ssn,social security number,employee's ssn,text,
lastname,last name,employee's last name,text,
firstname,first name,employee's first name,text,"commonsense evidence:
employee's full name is firstname lastname . "
hiredate,hire date,employee's hire date,text,yyyy-mm-dd
salary,,employee's salary,text,the unit is dollar per year
gender,,employee's gender,text,
performance,,employee's performance,text,Good / Average/ Poor
positionID,position id,the unique id for position,integer,
locationID,location id,the unique id for location,integer,