This property describes the inclusion relationship between two instances of E52 Time-Span.
This property supports the notion that the temporal extent of an instance of E52 Time-Span falls within the temporal extent of another instance of E52 Time-Span. It addresses temporal containment only, and no contextual link between the two instances of E52 Time-Span is implied. This property is transitive.
The time-span of the Apollo 11 moon mission (E52) falls within the time-span of the reign of Queen Elizabeth II (E52). (Riley, 2009) (Robinson, 2000)