Question: who plays rachel's mom in season 2 of friends
[{'answer': 'Marlo Thomas', 'provenance': [{'wikipedia_id': '27713419', 'title': 'Friends (season 2)', 'start_paragraph_id': 26, 'start_character': 12, 'end_paragraph_id': 26, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Cast and characters.:Guest stars.\n'}]}]