Complex sentence: He moved to Lawrence, Kansas in 1856, to support the "Free-State" movement; he was one of the founders of Emporia, Kansas where he established the "Kansas News" in 1857.
Split into simpler sentences: He moved to Lawrence, Kansas in 1856, to support the "Free-State" movement. He was one of the founders of Emporia, Kansas, where he established the "Kansas News" in 1857.