Calumet
...that despite its federal mandate to provide only intercity rail service, Amtrak operated the Calumet commuter train between Chicago, Illinois and the Indiana suburb of Valparaiso from 1979 to 1991?
...that despite its federal mandate to provide only <a class="mw-redirect" href="./Intercity_rail" id="mwAVA" rel="mw:WikiLink" title="Intercity rail">intercity rail</a> service, <a href="./Amtrak" id="mwAVE" rel="mw:WikiLink" title="Amtrak">Amtrak</a> operated the <i id="mwAVI"><b id="mwAVM"><a class="mw-redirect" href="./Calumet_(Amtrak)" id="mwAVQ" rel="mw:WikiLink" title="Calumet (Amtrak)">Calumet</a></b></i> <a class="mw-redirect" href="./Commuter_train" id="mwAVU" rel="mw:WikiLink" title="Commuter train">commuter train</a> between <a class="mw-redirect" href="./Chicago,_Illinois" id="mwAVY" rel="mw:WikiLink" title="Chicago, Illinois">Chicago, Illinois</a> and the <a href="./Indiana" id="mwAVc" rel="mw:WikiLink" title="Indiana">Indiana</a> suburb of <a class="mw-redirect" href="./Valparaiso_(IN)" id="mwAVg" rel="mw:WikiLink" title="Valparaiso (IN)">Valparaiso</a> from <a href="./1979" id="mwAVk" rel="mw:WikiLink" title="1979">1979</a> to <a href="./1991" id="mwAVo" rel="mw:WikiLink" title="1991">1991</a>?