Question: who played john boy walton on the waltons
[{'answer': 'Richard Earl Thomas', 'provenance': [{'wikipedia_id': '274793', 'title': 'Richard Thomas (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '274793', 'title': 'Richard Thomas (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 494, 'bleu_score': 0.8589483579946361, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12380274297763242341}, 'section': 'Section::::Abstract.'}]}]