Question: who plays the mom in schitt's creek
[{'answer': "Catherine O'Hara", 'provenance': [{'wikipedia_id': '42424137', 'title': "Schitt's Creek", 'start_paragraph_id': 4, 'start_character': 112, 'end_paragraph_id': 4, 'end_character': 128, 'bleu_score': 1.0, 'section': 'Section::::Synopsis.\n'}]}]