def map_type_list_field(old_type):
    """
    This function maps the list type into individual field type which can contain 
    the individual values of the list.
    
    Mappings
    - list:reference <table> --> refererence <table>
    - list:integer           --> integer
    - list:string            --> string
    """
    if (old_type == "list:integer"):
        return "integer"
    elif old_type.startswith("list:reference"):
        return old_type.strip("list:")
    elif old_type == "list:string":
        return "string"