Complex sentence: Peter Hopkirk, "The Great Game", 1994, page 100 Another to reach the region in the Great Game period, a naval officer called John Wood, came with an expedition to find the source of the river in 1839.
Split into simpler sentences: Peter Hopkirk, "The Great Game", 1994, page 100 Another to reach the region in the Great Game period was a naval officer called John Wood. He was sent on an expedition to find the source of the river in 1839.