Complex sentence: The Westall UFO encounter is an event that occurred at 11.00am on April 6th, 1966, for 20 minutes, more than 200 students and teachers at two Victorian state schools reported an unexplained flying object, that descended into a nearby open wild grass field.
Split into simpler sentences: The Westall UFO encounter is an event that occurred at 11.00am on April 6th, 1966. For 20 minutes, more than 200 students and teachers at two Victorian state schools reported an unexplained flying object, that descended into a nearby open wild grass field.