he knows about what
he know about what
pro:sub v prep pro:int
he knows about what ?
h iː WORD_BOUNDARY n oʊ z WORD_BOUNDARY ɐ b aʊ t WORD_BOUNDARY w ʌ t WORD_BOUNDARY
h e WORD_BOUNDARY k n o w s WORD_BOUNDARY a b o u t WORD_BOUNDARY w h a t WORD_BOUNDARY