Question: who was the last british royal to visit hong kong while it was under british rule
[{'answer': 'Charles , Prince of Wales', 'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 20, 'start_character': 171, 'end_paragraph_id': 20, 'end_character': 199, 'bleu_score': 1.0, 'section': 'Section::::History.:Handover to China.\n'}]}, {'provenance': [{'wikipedia_id': '27413692', 'title': 'British Hong Kong', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 505, 'bleu_score': 0.8921943917749381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17244911417728807384}, 'section': 'Section::::History.:Handover to China.\n'}]}]