Question: Ambrosius Aurelianus as a war leader of the Romano-British who won an important battle in the 5th century, according to a 6th-century British monk best known for his scathing religious polemic which recounts the history of the Britons before and during what?
{'answer': 'the coming of the Saxons', 'supporting_facts': [['Ambrosius Aurelianus', 0], ['Gildas', 0]]}