es fängt an zu donnern
es fängt an zu donnern ?
 ɛ s WORD_BOUNDARY f ɛ ŋ t WORD_BOUNDARY  a n WORD_BOUNDARY ts uː WORD_BOUNDARY d ɔ n ɜ n WORD_BOUNDARY
e s WORD_BOUNDARY f ä n g t WORD_BOUNDARY a n WORD_BOUNDARY z u WORD_BOUNDARY d o n n e r n WORD_BOUNDARY