Psyttaleia
...that Europe's largest sewage treatment plant is in Psyttaleia, Greece?
...that Europe's largest <a href="./Sewage_treatment" id="mwC5M" rel="mw:WikiLink" title="Sewage treatment">sewage treatment</a> plant is in <b id="mwC5Q"><a href="./Psyttaleia" id="mwC5U" rel="mw:WikiLink" title="Psyttaleia">Psyttaleia</a></b>, <a href="./Greece" id="mwC5Y" rel="mw:WikiLink" title="Greece">Greece</a>?