Question: what is the lowest point in north dakota
[{'answer': 'the Red River at Pembina', 'provenance': [{'wikipedia_id': '4599238', 'title': 'Geography of North Dakota', 'start_paragraph_id': 6, 'start_character': 324, 'end_paragraph_id': 6, 'end_character': 348, 'bleu_score': 1.0, 'section': 'Section::::Geographic divisions.:The Red River Valley.\n'}]}, {'provenance': [{'wikipedia_id': '4599238', 'title': 'Geography of North Dakota', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 385, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17939320537546843839}, 'section': 'Section::::Geographic divisions.:The Red River Valley.\n'}]}]