Question: where is the oldest functioning railway station in india located
[{'answer': 'Royapuram', 'provenance': [{'wikipedia_id': '33800614', 'title': 'Royapuram railway station', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33800614', 'title': 'Royapuram railway station', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 766, 'bleu_score': 0.9622032542074631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17283986519199314827}, 'section': 'Section::::Abstract.'}]}]