Bassac River
The river starts in Phnom Penh , Cambodia , and flows southerly , crossing the border into Vietnam near Châu Đốc . 
<triplet> Phnom Penh <subj> Cambodia <obj> country <triplet> Cambodia <subj> Phnom Penh <obj> contains administrative territorial entity <subj> Vietnam <obj> shares border with <triplet> Vietnam <subj> Cambodia <obj> shares border with <triplet> Châu Đốc <subj> Vietnam <obj> country