Complex sentence: In 1525, native people might have killed the Portuguese Alejo García, who was the first European to explore Paraguay by walking the whole Chaco Paraguayo, he also went through the "Tapé Avirú".
Split into simpler sentences: In 1525, native people might have killed the Portuguese Alejo García, who was the first European to explore Paraguay by walking the whole Chaco Paraguayo. He also went through the "Tapé Avirú".