Question: What is the date of birth of Geertruida De Haas-Lorentz's father?
Sentence (from "Geertruida de Haas-Lorentz"): Geertruida Lorentz studied physics at the University of Leiden under her father, and earned her doctor's degree in 1912 on a thesis entitled Over de theorie van de Brown'schen beweging en daarmede verwante verschijnselen
Relevant evidence: No