sentence: After some time , I felt sad , because I realised that I would n't be able to see the band playing on the stage , because I had to stay in front of the entrance .
modified: After some time I felt sad , because I realised that I wo n't be albe to see the bend playing at the stage , because I had to stay in front of the entry .
transformation: PUNCT, VERB:TENSE, SPELL, NOUN, PREP, NOUN