Question: who plays the mother on this is us
[{'answer': 'Mandy Moore', 'provenance': [{'wikipedia_id': '52995471', 'title': 'List of This Is Us characters', 'start_paragraph_id': 1, 'start_character': 157, 'end_paragraph_id': 1, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '52995471', 'title': 'List of This Is Us characters', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 186, 'bleu_score': 0.7979296449238731, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12113055965272894354}, 'section': 'Section::::Main characters.:Rebecca Pearson.\n'}]}]