Question: what is the largest bird on earth today
[{'answer': 'ostrich ( Struthio camelus )'}, {'provenance': [{'wikipedia_id': '41365573', 'title': 'List of largest birds', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 378, 'bleu_score': 0.7163738596440461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11022960487053782441}, 'section': 'Section::::Abstract.'}]}]