Question: Anne de Mortimer, Countess of Cambridge was the grandmother of the last of the Plantagenet dynasty whose defeat at Bosworth Field marked the end of what in England?
Sentence (from "Ballad of Bosworth Field"): The poem is thought to have been written by someone closely connected with the Stanley family, because of the way it praises the Stanley brothers for their role in the Battle of Bosworth Field in 1485.
Relevant evidence: No