Complex sentence: Giant Hogweed is native to the Caucasus Region and Central Asia; it was introduced to Britain as an ornamental in the 19th century; it has also spread to Germany, France, Belgium, United States and Canada.
Split into simpler sentences: Giant Hogweed is native to the Caucasus Region and Central Asia. It was introduced to Britain as an ornamental in the 19th century, and it has also spread to Germany, France, Belgium, United States and Canada.