def get_multi_label_options(defaults=None):
    """Multi-label-related options

    """
    if defaults is None:
        defaults = {}
    options = {'--labels': {'action': 'store', 'dest': 'labels', 'default':
        defaults.get('labels', None), 'help':
        'Comma-separated list of the labels to be expanded from a multi-label field.'
        }, '--label-separator': {'action': 'store', 'dest':
        'label_separator', 'default': defaults.get('label_separator', None),
        'help':
        'Separator used when splitting labels in the objective field.'},
        '--multi-label-fields': {'action': 'store', 'dest':
        'multi_label_fields', 'default': defaults.get('multi_label_fields',
        None), 'help':
        'Comma-separated list of the fields to be expanded as being multi-label. Name or column number.'
        }, '--label-aggregates': {'action': 'store', 'dest':
        'label_aggregates', 'default': defaults.get('label_aggregates',
        None), 'help':
        'Comma-separated list of aggregation functions for the multi-label field labels. Allowed aggregates: count, first and last'
        }}
    return options
