Question: is the metro silver line a bus or train
[{'answer': 'bus', 'provenance': [{'wikipedia_id': '21899514', 'title': 'Silver Line (Los Angeles Metro)', 'start_paragraph_id': 1, 'start_character': 34, 'end_paragraph_id': 1, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21899514', 'title': 'Silver Line (Los Angeles Metro)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 319, 'bleu_score': 0.9611463610973231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7605318150749853601}, 'section': 'Section::::Abstract.'}]}]