Canal station
... that a "frustration walk" connected Chicago Union Station with the rapid transit Canal station?
... that a "frustration walk" connected <a href="./Chicago_Union_Station" id="mwBWY" rel="mw:WikiLink" title="Chicago Union Station">Chicago Union Station</a> with the rapid transit <b id="mwBWc"><a href="./Canal_station_(CTA_Metropolitan_Main_Line)" id="mwBWg" rel="mw:WikiLink" title="Canal station (CTA Metropolitan Main Line)">Canal station</a></b>?