Question: what are natural structures hanging from a cave ceiling
[{'answer': 'A stalactite', 'provenance': [{'wikipedia_id': '29390', 'title': 'Stalactite', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29390', 'title': 'Stalactite', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 632, 'bleu_score': 0.908915771064921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8063931239081019154}, 'section': 'Section::::Abstract.'}]}]