Original sentence: According to  archaeologists, it is only six thousand years ago that populations used the hydro graphic basin of the Tietê river, a river a river that was also important during the time of the Bandeirantes, and is for the  electrification of the city of São Paulo
Edited sentence: According to  archaeologists, it is only six thousand years ago that populations used the hydro graphic basin of the Tietê river, a river  that was also important during the time of the Bandeirantes, and is for the  electrification of the city of São Paulo