Engerth locomotive
...that the oldest steam locomotive in Switzerland is an Engerth locomotive, a form of articulated locomotive?
...that the oldest <a href="./Steam_locomotive" id="mwAcE" rel="mw:WikiLink" title="Steam locomotive">steam locomotive</a> in <a href="./Switzerland" id="mwAcI" rel="mw:WikiLink" title="Switzerland">Switzerland</a> is an <i id="mwAcM"><b id="mwAcQ"><a href="./Engerth_locomotive" id="mwAcU" rel="mw:WikiLink" title="Engerth locomotive">Engerth locomotive</a></b></i>, a form of <a href="./Articulated_locomotive" id="mwAcY" rel="mw:WikiLink" title="Articulated locomotive">articulated locomotive</a>?