one piece a what
one piece of what
det:num n prep pro:int
one piece a what ?
w ʌ n WORD_BOUNDARY p iː s WORD_BOUNDARY ɐ WORD_BOUNDARY w ʌ t WORD_BOUNDARY
o n e WORD_BOUNDARY p i e c e WORD_BOUNDARY a WORD_BOUNDARY w h a t WORD_BOUNDARY