rivalry
...that the rivalry between Leeds United and Manchester United football clubs has its roots in the 15th century English civil war, the Wars of the Roses?
...that the <b id="mwDjQ"><a class="mw-redirect" href="./Leeds_United_and_Manchester_United_rivalry" id="mwDjU" rel="mw:WikiLink" title="Leeds United and Manchester United rivalry">rivalry</a></b> between <a class="mw-redirect" href="./Leeds_United_A.F.C." id="mwDjY" rel="mw:WikiLink" title="Leeds United A.F.C.">Leeds United</a> and <a href="./Manchester_United_F.C." id="mwDjc" rel="mw:WikiLink" title="Manchester United F.C.">Manchester United</a> <a class="mw-redirect" href="./Football_(soccer)" id="mwDjg" rel="mw:WikiLink" title="Football (soccer)">football</a> clubs has its roots in the 15th century <a href="./England" id="mwDjk" rel="mw:WikiLink" title="England">English</a> <a href="./Civil_war" id="mwDjo" rel="mw:WikiLink" title="Civil war">civil war</a>, the <a href="./Wars_of_the_Roses" id="mwDjs" rel="mw:WikiLink" title="Wars of the Roses">Wars of the Roses</a>?