Question: the individual most responsible for initiating portuguese voyages of exploration was
[{'answer': 'Afonso IV of Portugal', 'provenance': [{'wikipedia_id': '690842', 'title': 'Age of Discovery', 'start_paragraph_id': 41, 'start_character': 551, 'end_paragraph_id': 41, 'end_character': 572, 'bleu_score': 1.0, 'section': 'Section::::Atlantic Ocean (1419–1507).:Portuguese exploration.\n'}]}, {'provenance': [{'wikipedia_id': '690842', 'title': 'Age of Discovery', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 831, 'bleu_score': 0.9845548242372031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13528797383391349560}, 'section': 'Section::::Atlantic Ocean (1419–1507).:Portuguese exploration.\n'}]}]