Question: Bogusław I, of the House of Griffins was Duke of Pomerania-Stettin from 1156 to 1187, he was first married to Walburgis (d. 1177), daughter of which King of Denmark from 1146 until his death in 1182?
{'answer': 'Valdemar I of Denmark', 'supporting_facts': [['Bogusław I, Duke of Pomerania', 3], ['Valdemar I of Denmark', 0]]}