Complex sentence: It was discovered in 1973 by a Brazilian and French team, when excavating a site is located in the Southeastern portion of the state of Piaui in what is now the Serra da Capivara National Park.
Split into simpler sentences: It was discovered in 1973 by a Brazilian and French team. The site is located in the Southeastern portion of the state of Piaui in what is now the Serra da Capivara National Park.