Complex sentence: The best-known example is the Treaty of New Echota, which was negotiated and signed by a small faction of only twentyCherokee tribal members, not the tribal leadership, on December 29,1835.
Split into simpler sentences: The best-known example is the Treaty of New Echota. It was negotiated and signed by a small faction of Cherokee tribal members, not the tribal leadership, on December 29,1835.