Which of the following is true about how knowledge graphs might relate to the future of AI?

	(a)	Property graphs provide a sufficient representation for us to build future intelligent applications.
	(b)	Expressive logic-based representations are what we need for future intelligent applications.
	(c)	Some explicit representation similar to knowledge graphs is required, but exactly what is needed, is open for future research.
	(d)	Future techniques of AI will have reducing reliance on explicit representation.
	(e)	The goal of AI should be to eliminate the need for any representation.