<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Spitzweg" class="extiw" title="w:en:Carl Spitzweg"><span title="German painter (1808-1885)">Carl Spitzweg</span></a>
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<a rel="nofollow" class="external text" href="http://www.sothebys.com/de/auctions/ecatalogue/2011/european-paintings/lot.18.html">Sotheby's London, 22 November 2011, lot 18</a>