Complex sentence: Col. Percy Fawcett, who saw Sucuriju Gigante and lost in Mato Grosso in 1925, described that therein lived unbridled forms of animal life, and claimed that the whole wildlife and remainder ancient civilizations is hidden pose the people.
Split into simpler sentences: Col. Percy Fawcett, who saw Sucuriju Gigante and lost in Mato Grosso in 1925, describe that therein live unbridled forms animal. The whole wildlife and remainder ancient civilizations is hidden pose the people.