The children screamed when they saw the apparition in the cemetery.
The vivid apparition seemed so real that it completely scared me.
sally's apparition about the thief was surprising.
A ghostly apparition frightened Scooby Doo.
When it has a subject, verb, punctuation, capitalization, a predicate, and a complete thought. A sentence is a sentence when it is handed down by a judge (or a magistrate).