Question: who is described as a shrewd and knavish sprite
[{'answer': 'Puck', 'provenance': [{'wikipedia_id': '53346', 'title': "Puck (A Midsummer Night's Dream)", 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]