six plus six is twelve
six plus six be twelve
det:num adv det:num aux det:num
six plus six is twelve .
s ɪ k s WORD_BOUNDARY p l ʌ s WORD_BOUNDARY s ɪ k s WORD_BOUNDARY ɪ z WORD_BOUNDARY t w ɛ l v WORD_BOUNDARY
s i x WORD_BOUNDARY p l u s WORD_BOUNDARY s i x WORD_BOUNDARY i s WORD_BOUNDARY t w e l v e WORD_BOUNDARY