Groene Hart
Cities inside the Groene Hart include Zoetermeer , Alphen aan den Rijn , Gouda , Woerden and the smaller cities of Schoonhoven , Oudewater , Haastrecht , Nieuwkoop , Montfoort , Waddinxveen , Bodegraven and Boskoop . 
<triplet> Alphen aan den Rijn <subj> Groene Hart <obj> part of <subj> Boskoop <obj> contains settlement <triplet> Boskoop <subj> Alphen aan den Rijn <obj> located in the administrative territorial entity