@classmethod
def resolve_alias(cls, heading):
    ''
    titled_heading = heading.title()
    try:
        return cls.ALIASES[titled_heading]
    except KeyError:
        return heading
@classmethod
def resolve_alias(cls, heading):
    
    titled_heading = heading.title()
    try:
        return cls.ALIASES[titled_heading]
    except KeyError:
        return heading