sentence: I got to Birmingham at 14:00 , I think , and then , as I 'd never been to Birmingham , I had to look for the 02 Academy , where the event was taking place .
modified: I got to Birmingham at 14:00 , I think , and then , as I 've never been to Birmingham I had to look for the 02 Academy , where the event took place .
transformation: CONTR, PUNCT, VERB:TENSE