Question: who played greg brady in the brady bunch
[{'answer': 'Barry William Blenkhorn', 'provenance': [{'wikipedia_id': '3648904', 'title': 'Barry Williams (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3648904', 'title': 'Barry Williams (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 237, 'bleu_score': 0.950578622812921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10473989501988336868}, 'section': 'Section::::Abstract.'}]}]