Complex sentence: It was originally called Winthrop Park after an assemblyman, Col. Winthrop Jones, who was instrumental in obtaining the $132,825 appropriation for the purchase, and who was also the son of the Parks Commissioner.
Split into simpler sentences: It was originally called Winthrop Park after an assemblyman, Col. Winthrop Jones who raised $132,825 for the purchase. He was also the son of the Parks Commissioner.