Complex sentence: The Campo del Cielo refers to a group of iron meteorites or to the area where they were found situated on the border between the provinces of Chaco and Santiago del Estero, northwest of Buenos Aires, Argentina.
Split into simpler sentences: The Campo del Cielo refers to a group of iron meteorites or to the area where they were found. This area is situated on the border between the provinces of Chaco and Santiago del Estero, northwest of Buenos Aires, Argentina.