Question: who played donna's mom on that 70's show
[{'answer': 'Tanya Roberts', 'provenance': [{'wikipedia_id': '756494', 'title': 'Tanya Roberts', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '756494', 'title': 'Tanya Roberts', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 389, 'bleu_score': 0.6067537312696231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8674777670567676208}, 'section': 'Section::::Abstract.'}]}]