Question: what type of estuary is the columbia river
[{'answer': 'bay', 'provenance': [{'wikipedia_id': '22884807', 'title': 'Columbia River Estuary', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '22884807', 'title': 'Columbia River Estuary', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 125, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1823507437277807017}, 'section': 'Section::::Abstract.'}]}]