the first radio network in North America
...that the first radio network in North America was created by the Canadian National Railway in 1923?
...that <b id="mwBTU"><a href="./CNR_Radio" id="mwBTY" rel="mw:WikiLink" title="CNR Radio">the first radio network in North America</a></b> was created by the <a href="./Canadian_National_Railway" id="mwBTc" rel="mw:WikiLink" title="Canadian National Railway">Canadian National Railway</a> in 1923?