Question: Who is Humphrey, Duke Of Gloucester's paternal grandmother?
Sentence (from "Humphrey, Duke of Gloucester"): He proved a rash, impulsive, unscrupulous, and troublesome figure: he quarreled constantly with his brother, John, Duke of Bedford, and uncle, Cardinal Henry Beaufort, and went so far as to violently prosecute a dispute with the Duke of Burgundy, a key English ally in France, over conflicting claims to lands in the Low Countries.
Relevant evidence: No