Complex sentence: The abolitionist John Brown heard about Gerrit Smith's reforms, and left his anti-slavery activities in Kansas to buy of land, which later became known as the "Freed Slave Utopian Experiment," "Timbucto".
Split into simpler sentences: The abolitionist John Brown heard about Gerrit Smith's reforms, and left his anti-slavery activities in Kansas to buy of land here. This parcel later became known as the "Freed Slave Utopian Experiment," "Timbucto".