Complex sentence: On the night of December 31st of 1986, the Dupont Plaza became famous for something else: some bombs were placed around the casino area, where the New Year's party always took place, causing a blast that killed 97 persons and injured hundreds of others.
Split into simpler sentences: On the night of December 31st of 1986, the Dupont Plaza became famous for something else: bombs. These were placed around the casino area, where the New Year's party always took place, causing a blast that killed 97 persons and injured hundreds of others.