sentence: They announced that the Big One would occur that afternoon at 7:00 PM approximately , so they warned that people had to leave the city or go to safe places in the next few hours .
modified: They announced that the Big One earthquake would occur that afternoon at 7:00 PM approximately , so they alerted that people had to leave the city or go to save places in the few hours .
transformation: NOUN, VERB, OTHER, ADJ