Question: who won the last 4 majors in golf
[{'answer': 'Brooks Koepka', 'provenance': [{'wikipedia_id': '1506950', 'title': "Men's major golf championships", 'start_paragraph_id': 47, 'start_character': 1245, 'end_paragraph_id': 47, 'end_character': 1258, 'bleu_score': 1.0, 'section': "Section::::'Player of the Year' in major championships.\n"}]}, {'answer': 'Patrick Reed'}, {'answer': 'Justin Thomas'}, {'answer': 'Jordan Spieth', 'provenance': [{'wikipedia_id': '1506950', 'title': "Men's major golf championships", 'start_paragraph_id': 47, 'start_character': 957, 'end_paragraph_id': 47, 'end_character': 970, 'bleu_score': 1.0, 'section': "Section::::'Player of the Year' in major championships.\n"}]}]