Slieve Gallion
... that the Northern Irish marilyn Slieve Gallion is a volcanic plug?
... that the <a href="./Northern_Ireland" id="mwBxk" rel="mw:WikiLink" title="Northern Ireland">Northern Irish</a> <a class="mw-redirect" href="./Marilyn_(hill)" id="mwBxo" rel="mw:WikiLink" title="Marilyn (hill)">marilyn</a> <b id="mwBxs"><a href="./Slieve_Gallion" id="mwBxw" rel="mw:WikiLink" title="Slieve Gallion">Slieve Gallion</a></b> is a <a href="./Volcanic_plug" id="mwBx0" rel="mw:WikiLink" title="Volcanic plug">volcanic plug</a>?