Sava River
... that the Sava River is the largest tributary of the Danube in terms of discharge and the second-largest in terms of catchment area?
... that the <b id="mwDMU"><a href="./Sava" id="mwDMY" rel="mw:WikiLink" title="Sava">Sava River</a></b> <i id="mwDMc">(pictured)</i> is the largest tributary of the <a href="./Danube" id="mwDMg" rel="mw:WikiLink" title="Danube">Danube</a> in terms of <a href="./Discharge_(hydrology)" id="mwDMk" rel="mw:WikiLink" title="Discharge (hydrology)">discharge</a> and the second-largest in terms of <a href="./Drainage_basin" id="mwDMo" rel="mw:WikiLink" title="Drainage basin">catchment</a> area?