Complex sentence: John E. du Pont bought it for $935,000 in 1980, and it is believed to be locked away in a bank vault, while its owner is serving a 30-year sentence for murder.
Split into simpler sentences: John E. du Pont bought it for $935,000 in 1980. Today it is believed to be locked away in a bank vault, while its owner serves a 30-year sentence for murder.