Question: who came up with the idea to build the transcontinental railroad
[{'answer': 'Dr. Hartwell Carver', 'provenance': [{'wikipedia_id': '36541', 'title': 'First Transcontinental Railroad', 'start_paragraph_id': 7, 'start_character': 100, 'end_paragraph_id': 7, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Origins.\n'}]}, {'provenance': [{'wikipedia_id': '36541', 'title': 'First Transcontinental Railroad', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 437, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11264124109952556909}, 'section': 'Section::::Origins.\n'}]}]