Complex sentence: He also attempted to negotiate the withdrawal of the United States troops from Nicaragua in exchange for the surrender of Nicaraguan General Augusto Sandino; when the talks failed, he granted Sandino political asylum in Mexico--and a parcel of land in Temixco.
Split into simpler sentences: He also attempted to negotiate the withdrawal of the United States troops from Nicaragua in exchange for the surrender of Nicaraguan General Augusto Sandino. When the talks failed, he granted Sandino political asylum in Mexico and a parcel of land in Temixco.