Complex sentence: Fountain Avenue, located in Brooklyn, New York is a site off of the Belt Parkway, specifically Exit 15, which exit is Erskine Street, and which is composed of mostly landfill and has areas of swampland-like forest growth.
Split into simpler sentences: Fountain Avenue, located in Brooklyn, New York is a site off of the Belt Parkway, specifically Exit 15, named "Erskine Street". The area is mostly composed oflandfill and has areas of swampland-like forest growth.