sentence: The doorbell rang again and he opened the door again . His sister was with him and she was very scared , but there was nobody at the door again .... and this time , the noise at the top of the stairs was loader and he understood everything .
modified: The door rang again and he opened again the door , his sister was with him and she was very scared but there was anybody in the door again .... and this time , the noise at the top of the stairs was higher and he understood all .
transformation: NOUN, WO, PUNCT, PUNCT, NOUN, PREP, OTHER, OTHER