collection of artworks
...that the United Nations has a collection of artworks which were donated by its member states?
...that the <a class="mw-redirect" href="./United_Nations_Organization" id="mwD7I" rel="mw:WikiLink" title="United Nations Organization">United Nations</a> has a <b id="mwD7M"><a href="./United_Nations_Art_Collection" id="mwD7Q" rel="mw:WikiLink" title="United Nations Art Collection">collection of artworks</a></b> <i id="mwD7U">(<a href="./Soviet_Union" id="mwD7Y" rel="mw:WikiLink" title="Soviet Union">USSR</a> contribution pictured)</i> which were donated by its <a class="mw-redirect" href="./United_Nations_member_states" id="mwD7c" rel="mw:WikiLink" title="United Nations member states">member states</a>?