Question: what is the newest set of magic the gathering
[{'answer': 'Ixalan', 'provenance': [{'wikipedia_id': '507735', 'title': 'List of Magic: The Gathering sets', 'start_paragraph_id': 6, 'start_character': 44, 'end_paragraph_id': 6, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Expansion sets.\n'}]}, {'provenance': [{'wikipedia_id': '507735', 'title': 'List of Magic: The Gathering sets', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1404, 'bleu_score': 0.900846023957457, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13759347576491197441}, 'section': 'Section::::Abstract.'}]}]