which may be natural
which may be natural .
w ɪ t̠ʃ WORD_BOUNDARY m eɪ WORD_BOUNDARY b iː WORD_BOUNDARY n æ t̠ʃ ɚ ɹ ə l WORD_BOUNDARY
w h i c h WORD_BOUNDARY m a y WORD_BOUNDARY b e WORD_BOUNDARY n a t u r a l WORD_BOUNDARY