def convert_to_pd_dataframe(structured_data):
    """
    Converts AIF360 structured dataset to pandas dataframe.
    
    Parameters:
    structured_data (aif360.datasets.standard_dataset.StandardDataset): Structured dataset.
    
    Returns:
    df (pandas dataframe): Pandas dataframe.
    """
    
    df = structured_data.convert_to_dataframe()[0]
    return df