Assertion: dynasty's king | /r/HasProperty | firm shields
Facets:
value: for poland
type: TRANSITIVE-OBJECT
value: from the tatars
type: TRANSITIVE-OBJECT
Source sentences:
text: the Elbow-high, in his letter to the Pope wrote with regret: "The two last Ruthenian kings, that had been firm shields for Poland from the Tatars, left this world and after their death Poland is directly under Tatar threat.