Question: Æthelwulf of Berkshire (before 825 – 4 January, 871) was a Saxon ealdorman, he received a land grant in 843/44 from Brihtwulf, king of Mercia; and lost his life at which battle event?
{'answer': 'Battle of Reading', 'supporting_facts': [['Æthelwulf of Berkshire', 3], ['Battle of Reading (871)', 0]]}