Again
... that Japanese pop rock singer Yui's "Again" has the highest opening week sales for a female act in 2009?
... that <a class="mw-redirect" href="./Japanese_pop" id="mwCWA" rel="mw:WikiLink" title="Japanese pop">Japanese pop</a> rock singer <a href="./Yui_(singer)" id="mwCWE" rel="mw:WikiLink" title="Yui (singer)">Yui</a>'s "<b id="mwCWI"><a href="./Again_(Yui_song)" id="mwCWM" rel="mw:WikiLink" title="Again (Yui song)">Again</a></b>" has the highest opening week sales for a female act in 2009?