def extract_content(html, encoding=None, as_blocks=False):
    if 'content' not in _LOADED_MODELS:
        _LOADED_MODELS['content'] = load_pickled_model(
            'kohlschuetter_readability_weninger_content_model.pkl.gz')
    return _LOADED_MODELS['content'].extract(html, encoding=encoding, as_blocks=as_blocks)