Question: who played the son in steptoe and son
[{'answer': 'Wilfrid Brambell', 'provenance': [{'wikipedia_id': '175880', 'title': 'Steptoe and Son', 'start_paragraph_id': 10, 'start_character': 56, 'end_paragraph_id': 10, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Characters.\n'}]}]