Question: who played the willis's son on the jeffersons
[{'answer': 'Andrew Harold Rubin', 'provenance': [{'wikipedia_id': '9749470', 'title': 'List of The Jeffersons supporting characters', 'start_paragraph_id': 10, 'start_character': 14, 'end_paragraph_id': 10, 'end_character': 33, 'bleu_score': 1.0, 'section': 'Section::::Willis family.:Allan Willis.\n'}]}, {'answer': 'Jay Hammer', 'provenance': [{'wikipedia_id': '9749470', 'title': 'List of The Jeffersons supporting characters', 'start_paragraph_id': 4, 'start_character': 695, 'end_paragraph_id': 4, 'end_character': 705, 'bleu_score': 1.0, 'section': 'Section::::Willis family.:Helen Willis.\n'}]}, {'provenance': [{'wikipedia_id': '9749470', 'title': 'List of The Jeffersons supporting characters', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 1112, 'bleu_score': 0.573202675479618, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 448865727406268900}, 'section': 'Section::::Willis family.:Allan Willis.\n'}]}]