Danish straits
The Danish straits are the straits connecting the Baltic Sea to the North Sea through the Kattegat and Skagerrak . 
<triplet> North Sea <subj> Kattegat <obj> has part <subj> Skagerrak <obj> has part <triplet> Kattegat <subj> straits <obj> instance of <triplet> Skagerrak <subj> straits <obj> instance of <subj> North Sea <obj> part of