[Musuko-ga doko-de nani-o shite-ori-masu-ka]-wa , watashitachi-ni-mo wakar-anai-node-gozai-masu
son-NOM where-at what-ACC do-be-UH-Q-TOP we-DAT-even know–NEG-because-be-UH
We ourselves aren’t sure what our son is doing where.