UB-2
... that the World War I German U-boat UB-2 was the only one of the Type UB I submarines in the Flanders Flotilla not to be shipped by rail to Antwerp?
... that the <a href="./World_War_I" id="mwEO4" rel="mw:WikiLink" title="World War I">World War I</a> <a class="mw-disambig" href="./German" id="mwEO8" rel="mw:WikiLink" title="German">German</a> <a href="./U-boat" id="mwEPA" rel="mw:WikiLink" title="U-boat">U-boat</a> <b id="mwEPE"><a about="#mwt46" data-mw='{"parts":[{"template":{"target":{"wt":"SMU","href":"./Template:SMU"},"params":{"1":{"wt":"UB-2"},"2":{"wt":""},"3":{"wt":"2"}},"i":0}}]}' href="./SM_UB-2" id="mwEPI" rel="mw:WikiLink" title="SM UB-2" typeof="mw:Transclusion"><i>UB-2</i></a></b> was the only one of the <a href="./German_Type_UB_I_submarine" id="mwEPM" rel="mw:WikiLink" title="German Type UB I submarine">Type UB I submarines</a> in the Flanders Flotilla not to be shipped by rail to <a href="./Antwerp" id="mwEPQ" rel="mw:WikiLink" title="Antwerp">Antwerp</a>?