Complex sentence: It marked the first time that Liberia was governed by members of the native African majority and not the Americo-Liberian elite, and mass executions of members of the former government of William R. Tolbert, Jr. followed.
Split into simpler sentences: It marked the first time that Liberia was governed by members of the native African majority and not the Americo-Liberian elite. Mass executions of members of the former government of William R. Tolbert, Jr. followed.