Question: who is the quarter back for the broncos
[{'answer': 'Trevor John Siemian', 'provenance': [{'wikipedia_id': '46591772', 'title': 'Trevor Siemian', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46591772', 'title': 'Trevor Siemian', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 383, 'bleu_score': 0.831087146951704, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10531729143120314246}, 'section': 'Section::::Abstract.'}]}]