Wierzyca
Wierzyca is a river of Poland , a tributary of the Vistula in Gniew . 
<triplet> Wierzyca <subj> Vistula <obj> mouth of the watercourse <triplet> Vistula <subj> Wierzyca <obj> tributary <subj> Poland <obj> basin country <triplet> Gniew <subj> Wierzyca <obj> located in or next to body of water <subj> Poland <obj> country <subj> Vistula <obj> located in or next to body of water