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Bartel Leendert van der Waerden died on 1996-01-12.
Bartel Leendert van der Waerden was born on 1903-02-02.
Leendert van der Vlugt died in 1936.
Leendert van der Vlugt was born in 1894.
Leendert van der Cooghen was born in 1632.