Question: when does dean and sam find their dad
[{'answer': 'in the pilot episode', 'provenance': [{'wikipedia_id': '7290639', 'title': 'John Winchester (Supernatural)', 'start_paragraph_id': 5, 'start_character': 89, 'end_paragraph_id': 5, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '7290639', 'title': 'John Winchester (Supernatural)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 625, 'bleu_score': 0.9815648442794911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1734963333593093337}, 'section': 'Section::::Plot.\n'}]}]