Question: what is the last word of rule britannia
[{'answer': 'slaves', 'provenance': [{'wikipedia_id': '248056', 'title': 'Rule, Britannia!', 'start_paragraph_id': 6, 'start_character': 338, 'end_paragraph_id': 6, 'end_character': 344, 'bleu_score': 1.0, 'section': 'Section::::Original masque.\n'}]}]