Question: which explorer discovered a trade route around the southern tip of africa to india
[{'answer': 'Bartolomeu Dias', 'provenance': [{'wikipedia_id': '45592', 'title': 'Bartolomeu Dias', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45592', 'title': 'Bartolomeu Dias', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 296, 'bleu_score': 0.5948871276452611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6188348563050995504}, 'section': 'Section::::Abstract.'}]}]