thirty plus thirty is sixty
thirty plus thirty be sixty
det:num adv det:num aux det:num
thirty plus thirty is sixty .
θ ɜː ɾ i WORD_BOUNDARY p l ʌ s WORD_BOUNDARY θ ɜː ɾ i WORD_BOUNDARY ɪ z WORD_BOUNDARY s ɪ k s t i WORD_BOUNDARY
t h i r t y WORD_BOUNDARY p l u s WORD_BOUNDARY t h i r t y WORD_BOUNDARY i s WORD_BOUNDARY s i x t y WORD_BOUNDARY