trade their kidney
... that Iran is currently the only country in the world that legally allows a person to trade their kidney for monetary compensation?
... that <a href="./Iran" id="mwBTY" rel="mw:WikiLink" title="Iran">Iran</a> is currently the only country in the world that legally allows a person to <b id="mwBTc"><a href="./Kidney_trade_in_Iran" id="mwBTg" rel="mw:WikiLink" title="Kidney trade in Iran">trade their kidney</a></b> for monetary compensation?