Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Race name | Rider status | Winner | Team/Country |
| --- | --- | --- | --- | --- |
| 1945.0 | Victory Marathon | amateur | Robert Batot | France |
| 1946.0 | Brighton-Glasgow | am-ind | Mike Peers | Manchester |
| 1947.0 | Brighton-Glasgow | am-ind | George Kessock | Paris Cycles |
| 1948.0 | Brighton-Glasgow | am-ind | Tom Saunders | Dayton Cycles |
| 1949.0 | Brighton-Glasgow | am-ind | Geoff Clark | ITP |
| 1950.0 | Brighton-Glasgow | am-ind | George Lander | Fréjus Cycles |
| 1951.0 | Butlin Tour | amateur | Stan Blair | England |
| 1951.0 | Brighton-Glasgow | amateur | Ian Greenfield | Comet CC |
| 1951.0 | Tour of Britain | am-ind | Ian Steel | Viking Cycles |
| 1952.0 | Brighton-Glasgow | amateur | Bill Bellamy | Romford CC |
| 1952.0 | Tour of Britain | am-pro | Ken Russell | Ellis Briggs |
| 1953.0 | Brighton-Newcastle | amateur | Frank Edwards | Norfolk Olympic |
| 1953.0 | Tour of Britain | am-ind | Gordon Thomas | BSA Cycles |
| 1954.0 | Circuit of Britain | amateur | Viv Bailes | Teesside |
| 1954.0 | Tour of Britain | am-ind | Eugène Tambourlini | France |
| 1955.0 | Circuit of Britain | amateur | Des Robinson | Yorkshire |
| 1955.0 | Tour of Britain | am-ind | Tony Hewson | Sheffield |
| 1956.0 | Circuit of Britain | amateur | Dick McNeil | North-east |
| 1958.0 | Milk Race | am-ind | Richard Durlacher | Austria |
| 1959.0 | Milk Race | am-ind | Bill Bradley | England |
| 1960.0 | Milk Race | amateur | Bill Bradley | England |
| 1961.0 | Milk Race | amateur | Billy Holmes | England |
| 1962.0 | Milk Race | amateur | Eugen Pokorny | Poland |
| 1963.0 | Milk Race | amateur | Pete Chisman | England |
| 1964.0 | Milk Race | amateur | Arthur Metcalfe | England |
| 1965.0 | Milk Race | amateur | Les West | Midlands |
| 1966.0 | Milk Race | amateur | Józef Gawliczek | Poland |
| 1967.0 | Milk Race | amateur | Les West | Britain |
| 1968.0 | Milk Race | amateur | Gösta Pettersson | Sweden |
| 1969.0 | Milk Race | amateur | Fedor den Hertog | Netherlands |
| 1970.0 | Milk Race | amateur | Jiri Manus | Czechoslovakia |
| 1971.0 | Milk Race | amateur | Fedor den Hertog | Netherlands |
| 1972.0 | Milk Race | amateur | Hennie Kuiper | Netherlands |
| 1973.0 | Milk Race | amateur | Piet van Katwijk | Netherlands |
| 1974.0 | Milk Race | amateur | Roy Schuiten | Netherlands |
| 1975.0 | Milk Race | amateur | Bernt Johansson | Sweden |
| 1976.0 | Milk Race | amateur | Bill Nickson | Britain |
| 1977.0 | Milk Race | amateur | Said Gusseinov | USSR |
| 1978.0 | Milk Race | amateur | Jan Brzeźny | Poland |
| 1979.0 | Milk Race | amateur | Yuri Kashirin | USSR |
| 1980.0 | Milk Race | amateur | Ivan Mitchenko | USSR |
| 1981.0 | Milk Race | amateur | Sergei Krivosheev | USSR |
| 1982.0 | Milk Race | amateur | Yuri Kashirin | USSR |
| 1983.0 | Milk Race | amateur | Matt Eaton | USA |
| 1984.0 | Milk Race | amateur | Oleg Czougeda | USSR |
| 1985.0 | Milk Race | pro-am | Eric van Lancker | Fangio |
| 1986.0 | Milk Race | pro-am | Joey McLoughlin | ANC |
| 1987.0 | Milk Race | pro-am | Malcolm Elliott | ANC |
| 1987.0 | Kellogg's Tour | pro | Joey McLoughlin | ANC |
| 1988.0 | Milk Race | pro-am | Vasily Zhdanov | USSR |
| 1988.0 | Kellogg's Tour | pro | Malcolm Elliott | Fagor |
| 1989.0 | Milk Race | pro-am | Brian Walton | 7-Eleven |
| 1989.0 | Kellogg's Tour | pro | Robert Millar | Z-Peugeot |
| 1990.0 | Milk Race | pro-am | Shane Sutton | Banana |
| 1990.0 | Kellogg's Tour | pro | Michel Dernies | Weinnmann-SMM |
| 1991.0 | Milk Race | pro-am | Chris Walker | Banana |
| 1991.0 | Kellogg's Tour | pro | Phil Anderson | Motorola |
| 1992.0 | Milk Race | pro-am | Conor Henry | Ireland |
| 1992.0 | Kellogg's Tour | pro | Max Sciandri | Motorola |
| 1993.0 | Milk Race | pro-am | Chris Lillywhite | Banana |
| 1993.0 | Kellogg's Tour | pro | Phil Anderson | Motorola |
| 1994.0 | Kellogg's Tour | pro | Maurizio Fondriest | Lampre |
| 1998.0 | PruTour | pro | Stuart O'Grady | Crédit Agricole |
| 1999.0 | PruTour | pro | Marc Wauters | Rabobank |
Question:
Who was the winner in 1973 with an amateur rider status?
Answer:
Piet van Katwijk