Question: when does robert die in brothers and sisters
[{'answer': 'the season 4 finale', 'provenance': [{'wikipedia_id': '13965533', 'title': 'Robert McCallister (Brothers & Sisters)', 'start_paragraph_id': 12, 'start_character': 381, 'end_paragraph_id': 12, 'end_character': 400, 'bleu_score': 1.0, 'section': 'Section::::Storylines.:Season 4.\n'}]}, {'provenance': [{'wikipedia_id': '13965533', 'title': 'Robert McCallister (Brothers & Sisters)', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 674, 'bleu_score': 0.9604711568453751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8888101717176303712}, 'section': 'Section::::Storylines.:Season 4.\n'}]}]