Question: who has won all four golf majors in one year
[{'answer': 'Bobby Jones', 'provenance': [{'wikipedia_id': '224580', 'title': 'Grand Slam (golf)', 'start_paragraph_id': 6, 'start_character': 5, 'end_paragraph_id': 6, 'end_character': 16, 'bleu_score': 1.0, 'section': "Section::::The Men's Grand Slam.\n"}]}, {'provenance': [{'wikipedia_id': '224580', 'title': 'Grand Slam (golf)', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 230, 'bleu_score': 0.8661072626070151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15768702254417168727}, 'section': "Section::::The Men's Grand Slam.\n"}]}]