Complex sentence: Front Street is the origin street of Philadelphia's numbered street grid; there is no First Street, Front Street exists in its place, and numbered streets begin at the next major block with Second Street, approximately one-tenth of a mile to the west.
Split into simpler sentences: Front Street is the origin street of Philadelphia's numbered street grid. There is no First Street, Front Street exists in its place, and numbered streets begin at the next major block with Second Street, approximately one-tenth of a mile to the west.