Assertion: duchess's child | /r/HasProperty | richard ii
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Source sentences:
text: It was rumoured (and believed by many people in England and France) that he intended to seize the throne for himself and supplant the rightful heir, his nephew Richard, the son of the Black Prince, but there seems to have been no truth in this and on the death of Edward III and the accession of the child Richard II, John sought no position of regency for himself and withdrew to his estates.