Question: what is the bottom of a pendulum called
[{'answer': 'a weight', 'provenance': [{'wikipedia_id': '42709', 'title': 'Pendulum', 'start_paragraph_id': 1, 'start_character': 14, 'end_paragraph_id': 1, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'or bob', 'provenance': [{'wikipedia_id': '42709', 'title': 'Pendulum', 'start_paragraph_id': 4, 'start_character': 98, 'end_paragraph_id': 4, 'end_character': 104, 'bleu_score': 1.0, 'section': 'Section::::Simple gravity pendulum.\n'}]}, {'provenance': [{'wikipedia_id': '42709', 'title': 'Pendulum', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 354, 'bleu_score': 0.9679895851501501, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14850603804356296633}, 'section': 'Section::::Simple gravity pendulum.\n'}]}]