(not-understood
	:sender (agent-identifier :name j)
	:receiver (set (agent-identifier :name i))
	:content
		((action (agent-identifier :name j)
			(query-if
				:sender (agent-identifier :name j)
				:receiver (set (agent-identifier :name i))
				:content
					"<fipa-ccl content expression>"
				:ontology www
				:language FIPA-ACL))
		(unknown (ontology "www")))
	:language FIPA_SL)