Question: who is recently appointed as union railway minister
[{'answer': 'Piyush Goyal', 'provenance': [{'wikipedia_id': '23308780', 'title': 'Minister of Railways (India)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23308780', 'title': 'Minister of Railways (India)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 383, 'bleu_score': 0.644842871441283, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8634053127596311718}, 'section': 'Section::::Abstract.'}]}]