Complex sentence: In 1985 Soto de Viñuelas has been made in to the Regional Park of the Cuenca Alta del Manzanares, the largest protected natural area surface of the region, where it has been classified as Area B, the legal instrument that allows agricultural land use.
Split into simpler sentences: In 1985 Soto de Viñuelas was turned into the Regional Park of the Cuenca Alta del Manzanares, the largest protected natural area in the region. It has been classified as Area B, a legal instrument that allows agricultural land use.