Question: when was the first public railroad in the us started
[{'answer': '1830', 'provenance': [{'wikipedia_id': '398236', 'title': 'Timeline of railway history', 'start_paragraph_id': 39, 'start_character': 12, 'end_paragraph_id': 39, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::1800 to 1850.\n'}]}, {'provenance': [{'wikipedia_id': '398236', 'title': 'Timeline of railway history', 'start_paragraph_id': 40, 'start_character': 0, 'end_paragraph_id': 40, 'end_character': 373, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17903811055709280504}, 'section': 'Section::::1800 to 1850.\n'}]}]