Complex sentence: William Lloyd Garrison, one of the most influential American abolitionists, began publishing "The Liberator" in January 1831 not long after the appearance of the "Appeal", and early weekly editions of Garrison's newspaper focused on Walker's pamphlet.
Split into simpler sentences: William Lloyd Garrison, one of the most influential American abolitionists, began publishing "The Liberator" in January 1831 not long after the "Appeal" as published. Early weekly editions of Garrison's newspaper focused on Walker's pamphlet.