Question: the gakkel ridge is a boundary between which two tectonic plates
[{'answer': 'African and South American Plates', 'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 7, 'start_character': 305, 'end_paragraph_id': 7, 'end_character': 336, 'bleu_score': 0.668740304976422, 'section': 'Section::::Notable features.\n'}]}, {'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 791, 'bleu_score': 0.8291462181489371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10443745513154551894}, 'section': 'Section::::Abstract.'}]}]