sentence: The event started at 7 p.m. but all the volunteers who had signed a contract had to work from 8 a.m. Everything has to be perfect during such events , so we had no time to relax or even eat a decent meal !
modified: An event started at 7 p.m. but all the volunteers who had signed a contract had to work from 8 a.m. Everything has to be perfect during such events so we had no time to relax or even eat a decent meal !
transformation: DET, PUNCT