Assertion: henry's father | /r/CapableOf | serve as the source
Facets:
value: almost certainly
type: DEGREE
value: for act
type: PURPOSE
Source sentences:
text: More specifically, Gorboduc is the only known pre-seventeenth century text containing a scene in which a son unknowingly kills his father, and a father unknowingly kills his son, and as such, almost certainly served as the source for Act 2, Scene 5, in which Henry witnesses just such an incident.