Complex sentence: North American Piedmontese are a breed of domestic beef cattle originating from a select herd of fullblood Italian Piedmontese cattle that were imported into Canada in 1979, and into the United States in the early 1980s.
Split into simpler sentences: North American Piedmontese cattle are a breed of domestic beef cattle originating from an imported herd of select fullblood Italian Piedmontese cattle breeding stock. The foundation line was first imported from Italy into Canada in 1979, then into the United States in the early 1980s.