Tremont Street Subway
...that the Tremont Street Subway in Boston, Massachusetts is the oldest subway tunnel in North America?
...that the <b id="mwA9g"><a class="mw-redirect" href="./Tremont_Street_Subway" id="mwA9k" rel="mw:WikiLink" title="Tremont Street Subway">Tremont Street Subway</a></b> in <a class="mw-redirect" href="./Boston,_Massachusetts" id="mwA9o" rel="mw:WikiLink" title="Boston, Massachusetts">Boston, Massachusetts</a> is the oldest <a class="mw-disambig" href="./Subway" id="mwA9s" rel="mw:WikiLink" title="Subway">subway</a> tunnel in <a href="./North_America" id="mwA9w" rel="mw:WikiLink" title="North America">North America</a>?