Question: most common type of valley in the world
[{'answer': 'V - shaped', 'provenance': [{'wikipedia_id': '32416', 'title': 'Valley', 'start_paragraph_id': 36, 'start_character': 41, 'end_paragraph_id': 36, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Glacial valleys.:U-shaped or trough valley.\n'}]}, {'provenance': [{'wikipedia_id': '32416', 'title': 'Valley', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 478, 'bleu_score': 0.940986466889798, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3963998005285139031}, 'section': 'Section::::River valleys.\n'}]}]