Question: who conducted experiments to determine how much earth weighs
[{'answer': 'Henry Cavendish', 'provenance': [{'wikipedia_id': '318577', 'title': 'Cavendish experiment', 'start_paragraph_id': 1, 'start_character': 70, 'end_paragraph_id': 1, 'end_character': 85, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '318577', 'title': 'Cavendish experiment', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 567, 'bleu_score': 0.9375874466695201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11221555930906115911}, 'section': 'Section::::Abstract.'}]}]