Question: what other kingdom claimed ownership of the northern islands of scotland
[{'answer': 'Pictish', 'provenance': [{'wikipedia_id': '485036', 'title': 'Northern Isles', 'start_paragraph_id': 1, 'start_character': 540, 'end_paragraph_id': 1, 'end_character': 547, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '485036', 'title': 'Northern Isles', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 730, 'bleu_score': 0.983672097934538, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17662894302030650723}, 'section': 'Section::::History, culture and politics.:Pictish times.\n'}]}]