Question: how is bobby related to sam and dean
[{'answer': 'old friend', 'provenance': [{'wikipedia_id': '7632405', 'title': 'Bobby Singer', 'start_paragraph_id': 5, 'start_character': 90, 'end_paragraph_id': 5, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Fictional biography.\n'}]}, {'provenance': [{'wikipedia_id': '7632405', 'title': 'Bobby Singer', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1272, 'bleu_score': 0.9691303248930321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3673409404982558424}, 'section': 'Section::::Fictional biography.\n'}]}]