Question: who is the head of state in luxembourg
[{'answer': 'The Grand Duke of Luxembourg', 'provenance': [{'wikipedia_id': '203460', 'title': 'Monarchy of Luxembourg', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '203460', 'title': 'Monarchy of Luxembourg', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 445, 'bleu_score': 0.775654196435816, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7451494055008302276}, 'section': 'Section::::Abstract.'}]}]