Authorizing the Commissioner of Public Property, on behalf of the City, to accept title to all or a portion of the parcels of land in the area bounded by North Street, North 18th Street, Wallace Street, and North 19th Street; and amending Chapter 15-200 of The Philadelphia Code, entitled "Fairmount Park System," to include such properties among the areas designated as part of the Fairmount Park System; all under certain terms and conditions. — Open Common Ground