def postprocessor(path, key, value):
    """Convert key names to something bigquery-compatible, so it is
    possible to import the JSON into bigquery tables.

    """
    if key.startswith('#') or key.startswith('@'):
        key = key[1:]
    if key == 'clinical_results':
        value = {'truncated_by_postprocessor': True}
    return key, value
