Task: Property Constraint Reasoning (ontology: Arts_Media_Entertainment/CIDOC_CRM)

The property 'P8 took place on or within' applies to instances of 'E4 Period', and 'E5 Event' is a subclass of 'E4 Period'. Which class can appear as the value of 'P8 took place on or within' for instances of 'E5 Event'?

A. E11 Modification
B. E18 Physical Thing
C. E63 Beginning of Existence
D. E8 Acquisition

Answer: E18 Physical Thing