Question: the largest meteorite ever found on earth has a mass of how many kg
[{'answer': 'more than 60 tonnes', 'provenance': [{'wikipedia_id': '3858734', 'title': 'Hoba meteorite', 'start_paragraph_id': 1, 'start_character': 291, 'end_paragraph_id': 1, 'end_character': 310, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3858734', 'title': 'Hoba meteorite', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 639, 'bleu_score': 0.629597199928949, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8203314569600535317}, 'section': 'Section::::Abstract.'}]}]