Amstel
It flows from the Aarkanaal and Drecht in Nieuwveen northwards , passing Uithoorn , Amstelveen , and Ouderkerk aan de Amstel , to the IJ in Amsterdam . 
<triplet> Uithoorn <subj> Amstelveen <obj> shares border with <subj> Amstel <obj> located in or next to body of water <triplet> Amstelveen <subj> Uithoorn <obj> shares border with <subj> Amstel <obj> located in or next to body of water <triplet> Ouderkerk aan de Amstel <subj> Amstelveen <obj> located in the administrative territorial entity <triplet> Amstel <subj> IJ <obj> mouth of the watercourse <triplet> IJ <subj> Amstel <obj> inflows <triplet> Amsterdam <subj> Amstel <obj> located in or next to body of water <subj> IJ <obj> located in or next to body of water