Assertion: burgundy's mother | /r/HasProperty | cecily
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Source sentences:
text: But the next year, Margaret was left despairing when Clarence and Warwick supported a French-backed Lancastrian invasion of England: although she, together with her mother Cecily, Dowager Duchess of York, attempted to reconcile Clarence and Edward IV, the rebellion continued, and on 2 October 1470 the Lancastrians were returned to power and Edward had fled to Margaret and Charles in Burgundy.