Question: what do you call the curved upper surface of water
[{'answer': 'meniscus', 'provenance': [{'wikipedia_id': '227709', 'title': 'Meniscus (liquid)', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '227709', 'title': 'Meniscus (liquid)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 269, 'bleu_score': 0.957870874785216, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3670804568241215231}, 'section': 'Section::::Abstract.'}]}]