Complex sentence: The first HBC factor at the new Fort Simpson was Dr. John Frederick Kennedy, who married the daughter of the Gispaxlo'ots chief Ligeex as part of the diplomacy which established the fort on Gispaxlo'ots territory.
Split into simpler sentences: The first HBC factor at the new Fort Simpson was Dr. John Frederick Kennedy. He married the daughter of chief Ligeex of the Gispaxlo'ots, as part of the diplomacy which established the fort on Gispaxlo'ots territory.