Sembawang
...that the Sembawang, discovered in 1909, is the only natural hot spring on the main island of Singapore?
...that the <b id="mwAQs"><a class="mw-redirect" href="./Sembawang_Hot_Spring" id="mwAQw" rel="mw:WikiLink" title="Sembawang Hot Spring">Sembawang</a></b>, discovered in 1909, is the only natural <a href="./Hot_spring" id="mwAQ0" rel="mw:WikiLink" title="Hot spring">hot spring</a> on the main island of <a href="./Singapore" id="mwAQ4" rel="mw:WikiLink" title="Singapore">Singapore</a>?