Question: when was congress able to pass legislation that authorized a transcontinental railroad
[{'answer': 'July 1 , 1862', 'provenance': [{'wikipedia_id': '394957', 'title': 'Pacific Railroad Acts', 'start_paragraph_id': 4, 'start_character': 478, 'end_paragraph_id': 4, 'end_character': 491, 'bleu_score': 1.0, 'section': 'Section::::Act of 1862, and amended 1864-65.\n'}]}, {'provenance': [{'wikipedia_id': '394957', 'title': 'Pacific Railroad Acts', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 1124, 'bleu_score': 0.9364635522245991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6158875405896466034}, 'section': 'Section::::Act of 1862, and amended 1864-65.\n'}]}]