Which breed of dairy cattle originating in Holland produced the world-record breaking amount of semen for a bull in 2012?
Toystory (bull):  In 2012 Toystory produced a world record-breaking 2 millionth unit of semen at eleven years of age and was the first Holstein bull in history to achieve this mark. Holstein Friesian cattle: Holstein Friesians (often shortened to Holsteins in North America, while the term Friesians is often used in the UK) are a breed of dairy cattle originating from the Dutch provinces of North Holland and Friesland, and Schleswig-Holstein in Northern Germany and Jutland.
Holstein Friesians