Complex sentence: Historian Gonzalo Vial claims that a "historical debt" exists towards the Mapuche by the Republic of Chile, whereas the Coordinadora Arauco-Malleco aims at a national liberation of Mapuches.
Split into simpler sentences: Historian Gonzalo Vial claims that a "historical debt" exist towards the Mapuche by the Republic of Chile. More radically the Coordinadora Arauco-Malleco aims at a national liberation of Mapuches.