not till fifteen minutes
not till fifteen minute
neg v det:num n
not till fifteen minutes .
n ɑː t WORD_BOUNDARY t ɪ l WORD_BOUNDARY f ɪ f t iː n WORD_BOUNDARY m ɪ n ɪ t s WORD_BOUNDARY
n o t WORD_BOUNDARY t i l l WORD_BOUNDARY f i f t e e n WORD_BOUNDARY m i n u t e s WORD_BOUNDARY