twenty whites and twenty blacks
twenty white and twenty black
det:num n coord det:num n
twenty whites and twenty blacks?
t w ɛ n t i WORD_BOUNDARY w aɪ t s WORD_BOUNDARY æ n d WORD_BOUNDARY t w ɛ n t i WORD_BOUNDARY b l æ k s WORD_BOUNDARY
t w e n t y WORD_BOUNDARY w h i t e s WORD_BOUNDARY a n d WORD_BOUNDARY t w e n t y WORD_BOUNDARY b l a c k s ? WORD_BOUNDARY