un biberón de quien
un biberón de quien ?
u n WORD_BOUNDARY β i β e̞ ɾ o̞ n WORD_BOUNDARY d e̞ WORD_BOUNDARY k j e̞ n WORD_BOUNDARY
u n WORD_BOUNDARY b i b e r ó n WORD_BOUNDARY d e WORD_BOUNDARY q u i e n WORD_BOUNDARY ? WORD_BOUNDARY