la nuit est tombée
la nuit être tomber
det:art n v:aux part
la nuit est tombée .
l a WORD_BOUNDARY n y i WORD_BOUNDARY ɛ WORD_BOUNDARY t ɔ̃ b e WORD_BOUNDARY
l a WORD_BOUNDARY n u i t WORD_BOUNDARY e s t WORD_BOUNDARY t o m b é e WORD_BOUNDARY