Lubefu River
The Lubefu River is a tributary of the Sankuru River , which in turn is a tributary of the Kasai River in the Democratic Republic of the Congo . 
<triplet> Lubefu River <subj> Sankuru River <obj> mouth of the watercourse <subj> Democratic Republic of the Congo <obj> country <triplet> Sankuru River <subj> Lubefu River <obj> tributary <subj> Kasai River <obj> mouth of the watercourse <subj> Democratic Republic of the Congo <obj> country <triplet> Kasai River <subj> Sankuru River <obj> tributary <subj> Democratic Republic of the Congo <obj> country