Role+Agent+*type plus right

For now, we use a virtual card, but with no content defined from the context.  A *structure rule can make any Cardtype+agent exist for any given Cardtype, and later it may get some plus cards related to the agent and to the [[Intentions]], [[Actions]] and other objects of the [[FlowSystems]] relationships.

For now, we can represent collective agency in [[Role]] cards, but maybe we want a user defined type (e.g. [[Circle]]). for this.