Question: Who is the paternal grandmother of Mary Percy, Countess Of Northumberland?
Sentence (from "Anne Percy, Countess of Northumberland"): To avoid punishment for her prominent role in the failed insurrection, Anne, along with her infant daughter, was forced into exile in Flanders, where she spent the rest of her life involving herself in Catholic plots and maintaining contact with the other English Catholic exiles.
Relevant evidence: No