def _passthrough_zotero_data(zotero_data):
    """
    Address known issues with Zotero metadata.
    Assumes zotero data should contain a single bibliographic record.
    """
    if not isinstance(zotero_data, list):
        raise ValueError(
            '_passthrough_zotero_data: zotero_data should be a list')
    if len(zotero_data) > 1:
        zotero_data = zotero_data[:1]
    return zotero_data
