Complex sentence: When Semencic's first article on the breed was published there were no Bordeaux Dogues in the United States, there were 600 examples left in the world, mostly in France, Holland and East Berlin, and the breed's numbers were on the decline.
Split into simpler sentences: When Semencic's first article on the breed was published, there were no Bordeaux Dogues in the United States. There were 600 examples left in the world, mostly in France, Holland and East Berlin, and the breed's numbers were on the decline.