Complex sentence: From 1577 to 1590, Sir Francis Drake circumnavigated the globe; and in 1579 he claimed for the Crown a section of the west coast of North America, as "Nova Albion", that many historians have identified as northern California.
Split into simpler sentences: From 1577 to 1590, Sir Francis Drake circumnavigated the globe. In 1579 he claimed for the Crown a section of the west coast of North America, which he named "Nova Albion", that many historians have identified as northern California.