Our method is based on two related insights: i) the context of the entity at time t reflects the events happening to the entity and the state of the entity at time t. ii) the difference in context before, at time t − 1, and after, at time t, reflect the associated state change at time t. However an entity can undergo a multiplicity of changes at the same time.
in a country election event, the country's state changes and it obtains a new value for its hasPresident relation.