Complex sentence: He was the first Filipino to head a government of the Philippines (as opposed to other historical states), and is considered by most Filipinos to have been the second president of the Philippines, after Emilio Aguinaldo (1897--1901).
Split into simpler sentences: He was the first Filipino to head a government of the Philippines (as opposed to other historical states). Quezón is considered by most Filipinos to have been the second president of the Philippines, after Emilio Aguinaldo (1897--1901).