Complex sentence: The last anyone heard of William Beausire was on July 2nd of that year, when witnesses reported seeing DINA officers taking him from a building in Iran Street, Santiago, since when he was never seen again.
Split into simpler sentences: The last anyone heard of William Beausire was on July 2nd. Witnesses reported seeing DINA officers taking him from a building in Iran Street, Santiago, since when he was never seen again.