Question: Who was born later, Grégoire Maertens or Karl Litzmann?
Sentence (from "Grégoire Maertens"): Gregoire Maertens was born in Bruges, where he became active in the local Esperanto movement in Bruges as of 1946 and became a member of the BEF(" Belga Esperanto- Federacio" or Belgian Esperanto Federation).
Relevant evidence: No