how could he know
how could he know
pro:int mod pro:sub v
how could he know ?
h aʊ WORD_BOUNDARY k ʊ d WORD_BOUNDARY h iː WORD_BOUNDARY n oʊ WORD_BOUNDARY
h o w WORD_BOUNDARY c o u l d WORD_BOUNDARY h e WORD_BOUNDARY k n o w WORD_BOUNDARY