Complex sentence: The two children have thus to cross the line of demarcation without identification papers where they cannot remain, their route leads them to Nice where they undergo a German interrogation in the Excelsior hotel, in Montlucon, with Aix-les-Bains.
Split into simpler sentences: The two children have thus to cross the line of demarcation without identification papers where they cannot remain. Their route leads them to Nice where they undergo a German interrogation in the Excelsior hotel, in Montlucon, with Aix-les-Bains.