Assertion: henry's son | /r/HasProperty | duke of clarence
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Source sentences:
text: It also ended future discussion as to whether the descendants of the fourth son of Edward III, Edmund, Duke of York, through marriage to Philippa, heiress of the second son, Lionel, Duke of Clarence, had a superior or inferior claim to those of the third son John of Gaunt, who had held the throne for three generations.