Question: who signed the order to build the transcontinental railroad
[{'answer': 'Lincoln', 'provenance': [{'wikipedia_id': '36541', 'title': 'First Transcontinental Railroad', 'start_paragraph_id': 21, 'start_character': 278, 'end_paragraph_id': 21, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::Origins.:Possible routes.\n'}]}, {'provenance': [{'wikipedia_id': '36541', 'title': 'First Transcontinental Railroad', 'start_paragraph_id': 37, 'start_character': 0, 'end_paragraph_id': 37, 'end_character': 879, 'bleu_score': 0.940751769430995, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9989119798966198703}, 'section': 'Section::::Authorization and funding.\n'}]}]