With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Wars of the Roses were a series of wars for control of the throne of England by rival houses.
text_B: The Wars of the Roses were a series of wars for control of the throne of England fought between supporters of two rival branches of the royal House of Plantagenet  : the House of Lancaster -LRB- associated with a red rose -RRB- , and the House of York -LRB- whose symbol was a white rose -RRB- .. England. England. House of Lancaster. House of Lancaster. House of York. House of York. throne of England. throne of England. House of Plantagenet. House of Plantagenet. white rose. White Rose of York. The conflict lasted through many sporadic episodes between 1455 and 1487 ; however , there was fighting before and after this period between the houses .. The power struggle ignited around social and financial troubles following the Hundred Years ' War , combined with the mental infirmity and weak rule of Henry VI which revived interest in Richard of York 's claim to the throne .. Henry VI. Henry VI of England. Richard of York. Richard of York, 3rd Duke of York. Richard. Richard of Shrewsbury, Duke of York. Historians disagree about whether the Wars of the Roses were caused by the structural problems of bastard feudalism or Henry VI 's ineffectiveness as king .. Henry VI. Henry VI of England. bastard feudalism. bastard feudalism. With the Duke of York 's death , the claim transferred to his heir , Edward , who later became the first Yorkist king of England , as Edward IV .. England. England. Edward IV. Edward IV of England. Duke of York. Richard of York, 3rd Duke of York. His son reigned for 86 days as Edward V , but Parliament then decided that Edward and his brother Richard were illegitimate and offered the crown to Edward IV 's younger brother , who became Richard III .. Edward IV. Edward IV of England. Richard III. Richard III of England. Edward V. Edward V of England. Richard. Richard of Shrewsbury, Duke of York. The two young princes disappeared within the confines of the Tower of London .. disappeared. Princes in the Tower. Tower of London. Tower of London. The final victory went to a claimant of the Lancastrian party , Henry Tudor , Earl of Richmond , who defeated the last Yorkist king , Richard III , at the Battle of Bosworth Field .. Richard III. Richard III of England. Richard. Richard of Shrewsbury, Duke of York. Battle of Bosworth Field. Battle of Bosworth Field. After assuming the throne as Henry VII , he married Elizabeth of York , the eldest daughter and heir of Edward IV , thereby uniting the two claims .. Henry VII. Henry VII of England. Edward IV. Edward IV of England. Elizabeth of York. Elizabeth of York. The House of Tudor ruled the Kingdom of England until 1603 , with the death of Elizabeth I , granddaughter of Henry VII and Elizabeth of York .. England. England. House of Tudor. House of Tudor. Henry VII. Henry VII of England. Elizabeth of York. Elizabeth of York. Kingdom of England. Kingdom of England. Elizabeth I. Elizabeth I
related.