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Earn +20 ptsQ: When did Willem Jan Knoop die?
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When did Willem Blaeu die?
Willem Blaeu died on 1638-10-21.
When did Willem Johannes Leyds die?
Willem Labeij died in 2011.
When did Willem Einthoven die?
Willem Einthoven died on September 29, 1927 at the age of 67.
When was Baron Johann Knoop born?
Baron Johann Knoop was born in 1846.
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Jan Opletal died in 1939.
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