Niina muisti puolimatka-ssa [Päivi-n unohta-nee-n lähti-e-ssä ostokse-t].
N.NOM remembered half.way-INE P-GEN forget-NUT-ACC leave-DE-INE shopping-PL.ACC
Niina remembered (when they were) half-way (there that) Päivi (had) forgotten the shopping (when they were) leaving