Complex sentence: The coins were dated 1711 provided the vital clue to Playford finally identifying the wreck as being the Dutch ship Zuytdorp (wicki entry) and to both Tom Pepper and Phillip Playford being named joint discoverers of the wreck in 1994 by the Western Australian Government.
Split into simpler sentences: The coins were dated 1711 and provided the vital clue for Playford to finally identify the wreck as being the Dutch ship Zuytdorp. Both Tom Pepper and Phillip Playford were named joint discoverers of the wreck in 1994 by the Western Australian Government.