Complex sentence: Greene, a British intelligence officer in Freetown, Sierra Leone, drew on his experience there; although Freetown is not mentioned in the novel, Greene confirms the location in his memoir, "Ways of Escape".
Split into simpler sentences: Greene, a British intelligence officer in Freetown, Sierra Leone, drew on his experience there. Although Freetown is not mentioned in the novel, Greene confirms the location in his memoir, "Ways of Escape".