Question: what four major plates make up the floor of the atlantic ocean
[{'answer': 'Eurasian', 'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 1, 'start_character': 249, 'end_paragraph_id': 1, 'end_character': 257, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'North American', 'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 1, 'start_character': 262, 'end_paragraph_id': 1, 'end_character': 276, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'African', 'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 1, 'start_character': 329, 'end_paragraph_id': 1, 'end_character': 336, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'South American', 'provenance': [{'wikipedia_id': '145705', 'title': 'Mid-Atlantic Ridge', 'start_paragraph_id': 1, 'start_character': 341, 'end_paragraph_id': 1, 'end_character': 355, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'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': 11126304092697985558}, 'section': 'Section::::Abstract.'}]}]