context: Twice during his time at this school Constantin won a prize as the best mathematics student in Belgium.
source: At this stage Carathéodory began training as a military engineer.
reference_original: في هذه المرحلة، بدأ Carathéodory التدريب كمهندس حربي.
reference_flipped: في هذه المرحلة، بدأت Carathéodory التدريب كمهندسة حربية.